It's HOTS question

It's HOTS question The top of a ladder of length 15 m reaches a window 9 m above the ground. the distance between the base of the wall and that of the ladder ?

use pythogoras theorem
length square+hypotenuse square=base square
15*15+9*9
225+81
306 square root
=17.49285568.........
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c2=a2+b2
152=c2+92
c2=225-81
c2=144
c=12
Thedistance between the base of the wall and that of the ladder is 12m.
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By pytheogoreas theorem

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