Triangle angle sum
Polygons, solids and transformations
Essential Mathematics Year 7
MaffsGuru Logo Sitting
Videos in this series
Please select a video from the same chapter
Video Images Video Images


This video looks at how to find the missing angles from any triangle using nothing but some basic maths and a calculator (or your brain!). We look at all the different types of triangles there are and the fact that, no matter what they look like, they all have 180 degrees inside of them. We use this rule to find the missing angles without the use of a protractor. I then make things a little more complicated by adding straight lines into the diagrams! This is funky but uses another rule that angles on a straight line add to 180 degrees. With lots of examples, I finish by looking at FUZX! If you don't know what that means, then watch the video. It's an awesome area of Mathematics!!! So much fun had sitting in front of a camera. I hope you enjoy the video. Let me know what you think by leaving a comment below.

There are no current errors with this video ... phew!

There are currently no lesson notes at this time to download. I add new content every week.
Video tags

sum of angles of triangle is 180 proof sum of angles on a straight line triangle angle sum triangle angles FUZX alternate angles in maths alternate angles on parallel lines alternate angles examples Year 7 Maths angles on a straight line angles on a straight line add up to angles questions angles questions and answers angles in a triangle