in rectangle abcd, ab =20 , angle bac = 60 degree, calculate the length of side bc and diagonally ac and bd
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Step-by-step explanation:
In △ABC, from the above figure
tan 60° = AB/BC = √3
√3 = BC/20
∴ BC=20 √3 cm
cos60∘ = AB/AC = 1/2
1/2 = 20/AC
∴ AC=40 cm
In a rectangle, the two diagonals are equal.
∴ AC=BD=40 cm
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