Question

A 20-foot ladder is leaning against a tree. The bottom of the ladder is 12 feet away from the bottom of the tree. Approximately how high up the tree does the top of the ladder reach? a2.4 feet b6 feet c9.2 feet d16 feet

Answer 1

you need to use pythagorean theorem
20 is the hypotenuse, so

12^2 + b^2 = 20^2
144 + b^2 = 400
b^2 = 256 
b = 16

D. 16 feet