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1. If in a triangle, the area is numerically equal to the perimeter, then the radius of the inscribed circle of the triangle is :

A. 1

B. 1.5

C. 2

D. 3

Solution:

\begin{aligned} Radius = \frac{Area}{Semi - perimeter} \\ Radius = (Area \times \frac{2}{Area}) \\ Radius = 2 \end{aligned}

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