If the length of diagonal AC of a square ABCD is 5.2 cm then area of the square ABCD is_________?
Correct answer: B. 13.52 sq.cm
- A. 15.12 sq.cm
- B. 13.52 sq.cm
- C. 12.62 sq.cm
- D. 10 sq.cm
Explanation
For a square, the diagonal satisfies d² = 2A, so A = d² ÷ 2 = (5.2 cm)² ÷ 2 = 27.04 cm² ÷ 2 = 13.52 cm². The likely wrong choice is 15.12 cm², which comes from incorrect squaring or using an unsuitable square-area formula.
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Area measures the surface enclosed by two-dimensional figures, while volume measures the space occupied by three-dimensional solids. Problems use formulas for rectangles, triangles, circles, prisms, cylinders, cones, spheres, and composite figures, including unit conversion and the distinction between surface area, lateral area, and volume.
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