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The diagonal of a square is 10 cm. What is its area?

Class 8Pythagoras TheoremGeometry

A $40 cm^{2}$
B $50 cm^{2}$
C $100 cm^{2}$
D $25 cm^{2}$

Step-by-Step Solution

If the side is

s

, then

s^{2} + s^{2} = 1 0^{2}

, so

2 s^{2} = 100

and the area

s^{2} = 50 cm^{2}

.

Answer: B)

50 cm^{2}

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