Jasmine wants to measure the height of her apartment building. She places a pocket mirror on the ground 20 ft from the building and steps backwards until she can see the top of the building in the mirror. She is 1.5 ft from the mirror and her eyes are 5.25 ft above the ground, The angle formed by her line of sight and the ground is congruent to the angle formed by the reflection of the building and the ground. How tall is the building?