# Similar Triangles

### How To : Use the A-A Property to determine 2 similar triangles

Dougsimmsonline shows how to determine whether or not 2 triangles are similar. Not only does he go on to show that they are but he describes step by step how to do the math to find missing angles. He does this process twice to show one set of triangles being similar and show t ...more

### How To : Find a missing part of a triangle, similar to another

In this tutorial the author shows how to find out the missing part of a triangle that is similar to another triangle. He explains the concept of similar triangle diagrammatically by showing that similar triangles have similar angles and parallel sides. Now he labels sides of s ...more

### How To : Find a missing side of a triangle, similar to another

In this tutorial the author shows how to find out the missing side of a triangle which is similar to an other triangle. He explains the concept of similar triangle using diagrams and by showing that similar triangles have equal corresponding angles and parallel sides. Now he l ...more

### How To : Determine whether 2 triangles are similar in geometry

Looking for instructions on how to determine whether two triangles are similar in geometry? From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier ...more

### How To : Estimate the diameter of the Sun

This science video shows how to estimate the diameter of the Sun, including step-by-step instructions for constructing the equipment needed and an overview of the geometry of similar triangles. If you like space and science experiments, you can't miss this one. This video tut ...more

### How To : Explore and decipher fractal geometry and self-similar mathematics

There wouldn't be any chaos in the world without Benoit Mandelbort— chaos theory, that is. Mandelbrot, who just passed away at the age of 85, pioneered fractal geometry and greatly influenced chaos theory. He spent most of his life working in physics, biology and astronomy, an ...more

### How To : Fold a wonton

In this video tutorial, viewers learn how to fold won-ton. There are 3 basic won ton shapes: the triangle, flower bud and nurse cap. For the triangle shape, simply fold it diagonally in half to create a triangle and seal the edges. For the flower bud, begin with a triangle fol ...more

### How To : Fold an erupting origami volcano

This video is about making an origami of a volcano. The video begins with aliMcRose talking about the geographical formations of Japan and then she shows a finished origami. The materials required are one piece of two sided paper and a pair of scissors. Fold the piece of paper ...more

### How To : Draw anime character Sasuke step by step

Here is a very easy method to draw a Sasuke in a step by step process by the artist Jack of Jill. First draw a circle for the head part. Then draw two lines crossing through the circle to match the eye part. At the bottom draw a small triangle similar to chin. Now draw the rea ...more

### How To : Fold a Textured Origami Ball

One of the most popular and basic origami geometric shapes is the "water bomb," which is a simple inflated cube. With a few extra folds and only a minor shift in approach, a more complex geometric shape can be achieved. This 24-faced, 3-dimensional object is formed using 8 id ...more

### How to Get Better at Halo : Reach

Introduction Halo: Reach is Bungie's latest and final addition to the franchise. Microsoft has claimed the title and from now on 343 Industries will be working on the Halo franchise. In my opinion, Bungie's last game is the best out of all of them. These are some tactics and ...more

### How To : Quickly make a paper snowflake

This video is about how to make a paper snowflake. These are just amazing shapes made out of sheets of paper. They are used for decoration. We can make a paper snowflake in just 2 minutes. First take a plain paper sheet and fold the sheet to make a triangle out of it. Now just ...more

### How To : Derive the area of a circle

This video is about deriving the area of a circle of radius 'r' using polar co-ordinate. First, we draw a circle and its radius 'r'. Then draw another radius close to it, so that it forms a small triangle-like figure. To find the area of the complete circle, divide the circle ...more

### How To : Make a Hyperbolic Paraboloid Using Skewers

In Monday's post, we created a sliceform model of a hyperbolic paraboloid. In today's post, we will create a similar model using skewers. The hyperbolic paraboloid is a ruled surface, which means that you can create it using only straight lines even though it is curved. In fac ...more

### How To : Fill a cone

This is a very interesting instructional video on how to fill a cone. Pour oil into a cone of diameter 30 inches and depth 40 inches. Now find the volume of the oil as a function of its depth. Volume = 1 over 3 phi rsquare h. We don't know the height and depth of the oil poure ...more

### News : Escher Tessellated Polyhedra

After Cory Poole posted some great Escher snowflakes, and Cerek Tunca had the great idea of using it as a base for a tetrahedron, well, I just had to give it a go. I will post a few more pictures and variants later (I think this was what Cerek was envisaging—if not let me know ...more

### How To : Create Parabolic Curves Using Straight Lines

Curve stitching is a form of string art where smooth curves are created through the use of straight lines. It is taught in many Junior High and High School art classes. I discovered it when my math students started showing me the geometric art they had created. The process of ...more

### How To : Tie a celtic triangle knot easily

If you are interested in tying knots just for show and are looking for a challenge, this next tutorial might be what you need. In this video, you'll find out how to tie a celtic trianlge knot easily. It is almost similar to another knot, but with some variations. Try to tie t ...more

### How To : Make a jumping paper frog

First of all take a rectangular sheet of paper. Now take a corner and fold it across to meet at the corner. Now crease it. Now take another corner and fold it over to the other side and crease again. Now bring in the x as shown so the sides are drawn inside and they form a tri ...more

### How To : Find the area of rectangles, triangles & rectangles

In this tutorial the author shows how to find the area of Rectangles, Triangles and Parallelograms. He says that an area of a figure is nothing but the amount of space taken up by that figure. He now explains that the area of rectangle is length times the breadth. He demonstra ...more

### How To : Knit a Triangle with Yarn Over Edge

The Yarn Over (YO) edge is a nice way to increase. Here's how to do it for a Triangle Scarf. WATCH THIS VIDEO TO SEE HOW TO DO THE YO BIND OFF. Cast on 1 stitch. Next row K that stitch and increase in that stitch so you have 2 stitches. Next row K those 2 stitches and increas ...more

### How To : Instant streaming Netflix on PS3 with a Netflix disc

There is now a way to watch and stream Netflix movies to your PlayStation 3 (PS3). Netflix will give you a free disk to do this and you are able to choose from thousands of titles to watch instantly as long as you maintain a minimum \$8.99/month Netflix membership. Once you rec ...more

### How To : Origami a nice swan

Origami isn't just folding paper, it's a form of art. So, if you want to try a new creative way to express yourself, and if you like birds, try out this tutorial on folding an origami paper swan. Graceful and elegant, a swan is the perfect subject for the graceful and elegant ...more

### News : Math Craft Inspiration of the Week: Christmas Chaos

If you take two flat mirrors and place them front to back and look at them, you can see an infinite number of reflections. While this is a self-replicating pattern and can be somewhat mesmerizing, it isn't anywhere as interesting as looking at the chaotic scattering of light t ...more

### How To : Make an inflatable paper box

1: Place paper sideways. Place the paper on the flat surface with the long edges at the top and bottom. 2: Fold long edge to opposite edge and unfold. Fold one long edge to the opposite long edge, crease, then unfold. 3: Fold longs edge to center and unfold. Fold one long edge ...more

### Google+ Pro Tips Round-Up : Week 1

With the Google+ team members being generous and free-flowing with advice on some of the more advanced features of Google+, we'll be publishing a weekly summary of the latest pro tips. Chances are, if you've been following the Google+ team members, you've seen some of these al ...more

### Math Craft Monday : Community Submissions (Plus Tiling with Coins)

It's Monday, and once again it's time to highlight some of the community submissions posted to the Math Craft corkboard. In addition, I thought we'd take a look at having fun with the geometrical properties of polygons and circles by using one of the best circles I know, the p ...more

### Math Craft Monday : Community Submissions (Plus How to Make the Golden Spiral)

It's Monday, time to highlight some of the community submissions posted to the Math Craft corkboard. One of these posts inspired me so much, I think it merits a closer look. Today, I present a "simple" method for making a golden spiral using just a straight edge, a compass, an ...more

### News : Everything You Need to Know About the New Facebook

Facebook unveiled a lot of changes last week, and, as usual, it's causing a lot of consternation and controversy. People within my Facebook, and on Google+, keep asking how to remove the ticker, and are trying, and mostly failing to make sense of the changes. I've decided to ...more

### News : So You Just Bought Photoshop. Now What?

Photoshop. It’s like a mountain to climb. You can chug up to the top, working hard, never letting up, or you can just go part way up and scoot around the side of the mountain and still get to the other side. Not everyone needs to be a Photoshop guru, or ninja pixel punisher. T ...more

### Kick Ass Review Part 2 : Gameplay and Design

Kick Ass Review Part 2: Gameplay and Design In the game, you can play as Kick Ass, Hit Girl, or Big Daddy. Each charater has a light and heavy attack that can be strung together into small combos. Each character also has three special attacks assigned to the Square, Triangle, ...more

### How To : Create a Working Movie Screen in Minecraft with Pistons and Redstone

Welcome to Minecraft World! Check out our tutorials, post to the community corkboard, and come play on our free server! The workshop last Saturday revolved around creating a working movie screen in Minecraft, and everyone joined in to see how it works. But this tutorial is fo ...more

### How To : Fold an paper origami soaring dragon

Majkee shows us step by step how to fold an origami paper dragon. You will need to take a square piece of paper and fold it so that it is shaped like a triangle. Open it back up and fold the piece of paper in half (like a hot dog bun). Open the paper and refold it so that is s ...more

### How To : Determine the area of a trapezoid

Need to figure out the area of a trapezoid for a household project? Even if you just want to sound smart, there is a simple formula that can be used every time you need to find the area of a trapezoid. Try the formula and see how good you are at geometry. A trapezoid is a fou ...more

### How To : Draw Spongebob

Today we're going to draw Spongebob! He's going to be facing forward, so even beginners should find drawing this guy to be a piece of cake! 1) Begin by sketching out a rectangle with a broader top and a narrow bottom, make sure it's not too skinny though. This will be the base ...more

### How To : Make a Sphere Shaped Origami Earth (difficult)

Similar as origami Earth, here, but more eye attractive Earth globe, which is actually a sphere shaped. Detailed instructions on how to make that origami on video below. It's much more difficult to assemble as the another Earth video I have, so I suggest that to experienced m ...more

### How To : Make 3D Origami Airplane

Instructions to make 3D origami of airplane similar to Airbus A380. It's self standing, made only with a folded paper (triangles). In video I tried to give instructions for every detail. Detailed instructions are in the video, but it's suggested to follow some simple steps fo ...more

### ARKit Roundup : More Fun Uses for Augmented Reality & Your iPhone Keep Popping Up

Developers are really having a field day with Apple's ARKit, announced last month. Since it's release to developers, videos have been appearing all over the Internet of the different ways that developers are getting creative with the ARKit using iPhones and iPads. Here are a ...more

### How To : View Cellular & Wi-Fi Data Speeds from the Status Bar of Your Samsung Galaxy Note 3

I have Verizon, America's largest 4G LTE network, as my cell service provider, but there are times when I find myself with a pretty shitty signal, rendering my upload and download speeds substantially slower than usual. One of those times are when I'm in my bedroom, and altho ...more

### Netflix 101 : How to Cast Shows & Movies from Your Phone to Your TV

Chromecast comes to mind when "casting" video from a smartphone to a big screen television, but it's not the only way to "cast" streaming content. This is especially true for Netflix, where you can cast movies and TV shows to not only a Chromecast-enabled TV, but to smart TVs, ...more

### How To : The 68 Coolest New iOS 10 Features You Didn't Know About

While iOS 11 is ready to take over your iPad, iPhone, and iPod touch, let's take a step back and check out all of the new features that iOS 10 brought to the public when it was released to everyone in Sept. 2016. Some of the updates from iOS 9 to iOS 10 were huge, as you'll s ...more

### News : Try These 5 Hot New Snapchat Lenses — The Simpsons, Playable Flappy Bird & More

In the wild world of Snapchat lenses, this week was an especially good one for cool effects. Lens-crafters (really hoping I can get that name to stick) have gotten a lot better at making non-gimmicky lenses that allow you to interact with them in new and unique ways. New to t ...more

### How To : Create Shareable Puzzles on Your iPhone & Challenge Your Friends to Solve Them

There is no shortage of games for your iPhone, and I'm sure you and your friends are probably sick to death of playing Candy Crush Saga by now. To spice things up, instead of waiting for cool new addicting games to come out, take control and make your own, then share them with ...more

### How To : Find & Change Weak Reused Passwords to Stronger Ones More Easily in iOS 12

The option to auto-fill passwords on your iPhone has been around a while now, but iOS 12 improves on it by suggesting strong passwords when first creating an account online in Safari or within apps. Apple has also added "password reuse auditing" for your iCloud Keychain, where ...more

While the PlayStation 3 is an awesome gaming console and the iPhone is an awesome smartphone, Apple and Sony have made two devices (that could be perfect for each other) nearly incompatible. Truth be told, this is more Apple's fault than Sony's, but we'll get into that later. ...more

### News : Top 9 New Safari Features in iOS 12 for iPhone

If there's one strength of Apple's that iOS and Android fans can agree on, it's the company's dedication to user privacy. With each new iteration of iOS, Apple builds upon these foundations, enhancing and increasing each iPhone's ability to protect its user's data. In iOS 12, ...more

### How To : Edit Structures in Fortnite Battle Royale

One of the more unique aspects of Fortnite Battle Royale is the ability to create structures. Using in-game materials, players can create walls and ramps for cover and to extend mobility. But creating isn't limited to just the basic generic structures. To really maximize their ...more

### News : Monthly Injection Has Potential to Replace Daily Handfuls of HIV Drugs

People infected with HIV take many different types of pills every day to decrease the amount of virus in their body, live a longer and healthier life, and to help prevent them from infecting others. That could all be in the past as new clinical trials testing the safety and ef ...more

### Hulu 101 : How to Cast Shows & Movies to Your TV

Your smartphone is the perfect place to watch Hulu on the go. Whether you're looking to catch up on your shows in a hotel, or your phone is the only screen available, mobile streaming can be a lifesaver. But what about when you have access to a TV? Wouldn't you rather watch yo ...more

Watching YouTube on your phone has never been a better experience than it is today — our smartphones have super-sharp displays that make watching the newest HD, QHD, and even 4K content look fantastic. But there are plenty of circumstances where we want to watch our content on ...more

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