Square

Calculate area of the square with diagonal 64 cm.

Correct result:

S =  2048 cm2

Solution:

a2+a2=u2 u=2a  S=a2=u2/2=6422=2048 cm2a^2+a^2 = u^2 \ \\ u = \sqrt2 a \ \\ \ \\ S = a^2 = u^2/2 = \dfrac{ 64^2}{2} = 2048 \ \text{cm}^2

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