A ladder is 25 feet long, leaning against a wall. The base is 7 feet from the wall. How high up the wall does it reach?
Answer
24 feet
How to solve it
1
Use Pythagorean theorem: a² + b² = c²
2
7² + h² = 25²
3
49 + h² = 625
4
h² = 576
5
h = 24 feet
Hints
This forms a right triangle
Use a² + b² = c²
Ladder is the hypotenuse