Answer:
27 inches
Explanation:
consider the diagonal 45 inches as A C [the hypotenuse of the right angled triangle
A B C] and the base 36 inches as A B and the height as B C
By Pythagoras Theorem,
AB2+BC2=AC2
(36)2+BC2=(45)2
BC2=(45)2−(36)2
BC2=(45+36)(45−36)[usingtheformulaa2−b2=(a+b)(a−b)]
BC2=81∗9
BC=81∗9−−−−−√
BC =9∗3=27inches
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so it would equal 27