The length of the diagonal of a square is 12 cm. Calculat...
The length of the diagonal of a square is 12 cm. Calculate the area of the square.
36cm2
48cm2
72cm2
18cm2
Correct answer is C
Let each side be l, then area = l2
Using Pythagoras theorem
l2+l2=122
2l2=144
divide both sides by 2
l2=72
Therefore, the Area of the square is 72cm2
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