Question 170464
A 10-m ladder is leaning against a building. The bottom of the ladder is 5 m from the building. How high is the top of the ladder?
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Apply Pythagorean's theorem:
Let H = height of top of ladder
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H^2 + 5^2 = 10^2
H^2 + 25 = 100
H^2 = 75
H = sqrt(75)
H = 8.66 m