It's possible to demonstrate and prove mathematically that the angle sum of every triangle is 180 degrees. The techniques used are useful for solving all kinds of other geometry problems too.

That angle is 65 degrees. Can you work out the others? Narrator: Don’t panic. You have all the information you need to beat this problem. And this is pretty much what geometry and a lot of Maths ...

Each side of the Great Pyramid rises at an angle of 51.5 degrees to the top. Not only that, each of the sides are aligned almost exactly with true north, south, east, and west. For a pyramid to ...

Geometry is like a puzzle with easy ... is a straight-angle pair will always add up to 180 degrees, so you can subtract the original angle from 180 to find the missing angle measures.