Geometric Reasoning: Level J

Problem solving with similar triangles

Use similar triangles to calculate the size of things

As with the examples given (goal posts and road), choose large objects around the school, measure lengths to calculate ‘unmeasurable’ lengths or heights.

Bonus Task: Diameter of the Sun

Use similar figures to measure the diameter of the sun. Needs to be done on a sunny day. Make sure you don’t look directly at the sun!

Explanation of Similar Triangles