Question

edwardo wants to find the height of a building using the sun, his height, and similar triangles. He goes out during his noon lunch break and comes in with a number he claims is the height of the building. What should you say to him?

Answer 1

You can indeed use similar triangles to get a side of another similar triangle.

let's say Edwardo stood next to the building and his shadow was 20ft, he's 4ft tall, and the building cast a shadow of 125ft, then, check the picture below.