Math
posted by Macy .
The base of a ladder leaning against a house is 30ft from the wall. if the ladder reaches 40ft high on the wall , how long is the ladder?

Since this forms a rightangle triangle, we can use the Pythagorean Theorem.
a^2 + b^2 = c^2
30^2 + 40^2 = c^2
900 + 1600 = c^2
2500 = c^2
50 = c