A cyclic quadrilateral has all four vertices on the circumference of a circle. Brahmagupta gave the formula for the area, A, of a cyclic quadrilateral whose edges have lengths a, b, c, d: A=√((s-a)(s-b)(s-c)(s-d)), where s is half of the perimeter. What is the area of the cyclic quadrilateral with sides of length 4 cm, 5 cm, 7 cm and 10 cm?
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6 cm²
13 cm²
26 cm²
30 cm²
36 cm²
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