Question 328702: a ladder 25 ft long leans against a building.If its foot is 10 ft from the building,how high does it reach the building?
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! a^2 + b^2 = c^2, where a and b are legs and c is the hypotenuse!
In this case, the ladder is the hypotenuse, so c= 25.
10^2 + b^2 = 25^2
100 + b^2 = 625
Subtract 100 from each side:
b^2 = 525
b= 
b= 22.91 feet approximately
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