Question 107893: A post is 9 ft. from one wall of a room and 40 ft. from the wall at right angle to it. How many ft. is it from the the intersection of the two walls?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A post is 9 ft. from one wall of a room and 40 ft. from the wall at right angle to it. How many ft. is it from the the intersection of the two walls?
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Let one wall be the x-axis ; Let the other wall be the y-axis.
The post is at (4,9); the interection of the walls is (0,0)
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Distance from (0,0) to (4,9):
d = sqrt(4^2+9^2)= sqrt(16+36)= sqrt(52) ft.
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Cheers,
Stan H.
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