Question

Find area and perimeter of a square with diagonal 28 cm
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Answer 1

Answer:

area of square =a×a

area=28×28

=784

perimeter of square =4a

=4×28

=112

Answer 2

Answer:

$1 \div 2 \times 28 \times 28$

(Area of rhombus formula)

Note: Square is a rhombus.

= 392cm2

ii) Perimeter

${s}^{2} = 392$

Therefore,

s = 19.79cm

So perimeter is 4(19.79)

= 79.19cm