What property is used to solve 4x+12=20

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

Can someone me do math because i am having a breakdown rn because i don’t get it

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .