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### Course: Geometry (all content)>Unit 2

Lesson 8: Sal's old angle videos

# The angle game

Using what we know to solve for angles in the Angle Game. Created by Sal Khan.

## Want to join the conversation?

• did u notice stars are made of triangles?
• yes,I did notice and yes it is very easy:)
• Till - i was completely baffled on how to figure out the angle on the other side of the star! I felt like a complete fool when i saw the end. But does this work with even a six-sided star?-Clove
• Yes, this would also work with a six-sided star. As long as you can find the other two angles of any one of the triangles that the angle you are trying to solve for is a part of, you can figure out the angle. ^^
(1 vote)
• Is this game copyrighted? i want to use it as a challenge for a friend :/
• Nope! It's actually just what sal calls it. So I do too.
• How do you explain a transversal line? I'm not sure if i spelled "transversal correctly but please explain it to me. thanks
• A transversal line is a line which crosses two parallel lines.
• what would happen if the parallel lines weren't parallel in the first game?
• is there a faster way to learn about the angles?
(1 vote)
• faster? maybe, but it will be much more boring.
• sorry but how can you guys understand this it is so hard i dont get it? :{
• why was it that one corner was 30* and one was 49* at ? I still don't understand :(
(1 vote)
• It was because when you add up 101 (the measure of corner 1) and 30 (measure of corner 2), you get 131.

In a triangle, when you add up all 3 of the angles, you get 180*, no matter what.
So, 180-131=49.

Therefore, the measure of the other angle would be 49*. Hope that helped! ^_^
• Why is this video called "The Angle Game"? What's the point?
(1 vote)
• Well, it's kind of like a game. You are trying to find out whats the answer and stuff. But yes I do understand what you mean. Solving math problems really isn't fun
• What is the purpose of this?
(1 vote)