the-area-of-a-square-is-80-cm-square.-estimate-the-perimeter-of-the-square. - GCSE Solutions - Central collection of solutions to all the Mathematics GCSE problems in the book, exams and past papers

15 The area of a square is 80 cm square. Estimate the perimeter of the square.

$T h e a r e a o f a s q u a r e i s 80 c m^{2^{}} . E s t i m a t e t h e p e r i m e t e r o f t h e s q u a r e .$

$A r e a o f a s q u a r e (s i d e x s i d e) = 80 c m^{2} .$

$\Rightarrow s^{2} = 80, s = \sqrt{80} = 8.9;$

$\Rightarrow s i d e = 8.9;$

$p e r i m e t r e = 4 x s i d e = 4 x 8.9 = 35.6 c m .$

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Ruhi Quadri Published on 02 Jan 2021