Question

Find the area of triangle whose three sides are 7cm, 4cm and 5cm.​

Answer 1

s=(s(s-a)(s-b)(s-c)

where s=(a+b+c)/2

s=(7+4+5)/2

s=16/2

s=8

s=(8(8-7)(8-4)(8-5)

s=(8(1)(4)(3)

s=96

s=9.79

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Answer 2

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