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Alik [6]
3 years ago
12

A firefighter in training leans a 21-foot extension ladder against an office building. How far from the building should the ladd

er be placed if the firefighter wants to reach a window that is 15 feet above the ground?
Mathematics
1 answer:
shtirl [24]3 years ago
4 0
Let 21 = Hypotenuse Let 15 = One leg on the y-axis. 
Draw triangle. a^2+b^2 = c^2 
a^2 = c^2 - b^2 a = sqrt(c^2-b^2) 
sqrt(21^2 - 15^2) = ~14.7 ft 
...|\ ...|..\ b.|....\ 21 ...|.....\ ...|____\ .......a
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