The sides of a triangle are 8cm, 15cm and 17cm. find its area.
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Let a = 8cm, b = 15cm, c = 17cm
s = (a + b + c)/2 = (8 + 15/ + 17)/2 = 40/2 = 20cm
∴ Area = root under √s(s - a)(s - b)(s - c)
= root under √20(20 - 8)(20 - 15)(20 - 17)
= root under √20 x 12 x 5 x 3 = 60 cm2
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