Question
If the length of diagonal AC of a square ABCD is 5.2 cm, then the area of the square is :
Answer: Option D Area of the square :
$$\eqalign{
& = \left[ {\frac{1}{2} \times {{\left( {5.2} \right)}^2}} \right]{\text{ sq}}{\text{.cm}} \cr
& {\text{ = }}\left( {\frac{1}{2} \times 27.04} \right){\text{ sq}}{\text{.cm}} \cr
& = 13.52{\text{ sq}}{\text{.cm}} \cr} $$
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