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Question

A 13-m-long ladder reaches a window of a building 12 m above the ground. determine the distance of the foot of the ladder from the building.


Solution

its form a right angled triangle
b y space a p p l y i n g space p y t h a g o r a s space t h e o r e m 13 squared equals 12 squared plus open parentheses d i s t a n c e close parentheses squared
d i s tan c e equals square root of 13 squared minus 12 squared end root d i s tan c e equals 5 m

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