Question

Find the area of the square whose side is equal to the diagonal of a rectangle of length 3 cm and breadth 4 cm.
A) 25 sq.cm
B) 16 sq.cm
C) 9 sq.cm
D) 4 sq.cm

Answer 1

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Answer 2

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Here is your answer.
AS we know that Diagonal ( D) =
$= \sqrt{l {}^{2} + b {}^{2} } \\ = \sqrt{4 {}^{2} + 3 {}^{2} } \\ = \sqrt{16 + 9} \\ = \sqrt{25} \\ = 5 \: cm$
Hence
Side of the square is 5 cm
Area of square = Side × Side
$= 5 \times 5 \\ = 25 \: \: cm {}^{2}$
So Option A 25 sq.cm is your answer

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