Question

A 24 foot ladder is leaning against the side of a house and is positioned 21 feet

from the house. How far above the ground is the point where the ladder touches
the building?

Answer 1

11.7 feet long

Explanation:

Formula: a^2+b^2=c^2

a^2+21^2=24^2

a^2+441=576

576-144=135

Square root of 135 is 11.61895004

Round to the nearest tenth is 11.7