How far from the base of the house do you need to place a 15’ ladder so that it exactly reaches the top of a 12’ wall?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section6.5: Similarity And Measurement
Problem 3C
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 How far from the base of the house do you need to place a 15’ ladder so that it exactly reaches the top of a 12’ wall?

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