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The Pythagorean Theorem and Ladders

Diagram of a ladder leaning up against a house

You're locked out of your house and the only open window is on the second floor, 25 feet above the ground. You need to borrow a ladder from one of your neighbors. There's a bush along the edge of the house, so you'll have to place the ladder 10 feet from the house. What length of ladder do you need to reach the window?

Give me a hint.
I'm ready to check my answer.

Andrew Wiles | Math's Hidden Woman | Pythagorean Puzzle
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