Question
The radius of the incircle of a triangle is 10 cm. if
the area of the triangle is 60 cm 2 , then its perimeter is?Solution
Area of any triangle = inradius of triangle x Semiperimeter So 60 = 10 x S or S = 60/10 = 6 cm; So perimeter = 2S =2 x 6 = 12 cm
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