I measured my height, the length from me to the mirror, and the length from my mirror to the tree.
My height-5.6 feet Tree to mirror distance-11 ft Mirror to me distance-3.5ft
We are trying to find out the height of the tree
11÷3.5=3.1 The scale factor is 3.1
5.6 x 3.1=17.36
The height of the tree is 17.36 feet high