When does it makes sense to use similar triangles to measure the height and length of objects in real life?

When determining the height of an object like putting a high pole for a fence in ur yard. Or better yet when u cut down a tree and u wanna figure how much space u need to cur it down so u don't hit a house or someone else's property

You can use a calculater and divide the minutes by the $$, hope that you

Google it that might work