Question

Find area of triangle whose 3 sides are 8 cm 8 cm and 15 cm

Answer 1

By applying Heron's formula,
Area of the triangle
$= \sqrt{s(s - a)(s - b)(s - c)} \\ = \sqrt{(8 + 8 + 15)(31 - 8)(31 - 8)(31 - 15)} \\ = \sqrt{31 \times 23 \times 23 \times 16}$
≈20.87912cm².


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