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Find the area of a square, one of whose diagonals is 3.8 m long

7.22
6.22
4.22
3.22

Correct Answer: 7.22

Explanation:

Area of the square = $\frac{1}{2} * d i a g o n a l 2 = \frac{1}{2} * 3.8 * 3.8 = 7.22 m 2$

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