Question 28

The diagonal of a square is 12 cm what is the length (in cm) of its side?

Solution

Let side of square = $$a$$ cm

Diagonal of square = $$d=12$$ cm

=> $$(a)^2+(a)^2=(d)^2$$

=> $$2a^2=(12)^2=144$$

=> $$a^2=\frac{144}{2}=72$$

=> $$a=\sqrt{72}=6\sqrt2$$ cm

=> Ans - (A)


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