Question

ABCD is a rectangular wall in which AB=3.15 m and BC = 1.77m. Find the

length of the diagonal BD.
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Answer 1

By Pythagoras’ theorem,
BD square= AB square + BC square
BD square= 3.15 square + 1.77 square
BD Square=13.0554
BD= square root 13.0554
BD=3.61 (to 3sf)