Can you sort these triangles into three different families and explain how you did it?
Construct two equilateral triangles on a straight line. There are two lengths that look the same - can you prove it?
Can you find and prove the relationship between the area of a trapezium and the area of a triangle constructed within it?
Can you make sense of these three proofs of Pythagoras' Theorem?
Why does this fold create an angle of sixty degrees?
Find the missing distance in this diagram with two isosceles triangles
You are only given the three midpoints of the sides of a triangle. How can you construct the original triangle?
