Question

16. A painter leans a 20-ft ladder against a building. The base of the ladder is 12 ft from the building. To the nearest foot, how high on the building does the ladder reach

Answer 1

Use the Pythagorean theorem to find building height. The ladder is c

Answer 2

a^2 + 12^2=20^2

Answer 3

23??

Answer 4

a^2 + 144=400
a^2= 400-144

a^2= 256
a= 16 ft