Question

Find the length of diagonal if area of square = 64sqcm
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Answer 1

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Find the length of diagonal if area of square = 64sqcm

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Formulas:

$\bold{\boxed{Area\: of \:square=</p><p> {(side)}^{2}}}$

Formula for finding diagonal:

$\bold{\boxed{D = \sqrt{2a} }}$

$= > D= \sqrt{2 \times 64} = \sqrt{128}$

$= > D = \sqrt{128} = 11.31$

We can take 11 cm as diagonal (round off )

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$\bold{\boxed{Perimeter \:of\: Square=4a}}$

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Answer 2

Answer:

11.31

Step-by-step explanation:

A Area=64

Unit conversion:

Using the formulas

$A = a {}^{2}$

$d = \sqrt{2} \: a$

Solving for d

$d = \sqrt{2 \: A } = \sqrt{2 \times 64} = 11.31371$