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  1. The inradius of triangle is 4 cm and its area is 34 sq. cm. the perimeter of the triangle is :
    1. 8.5 cm
    2. 17 cm
    3. 34 cm
    4. 20 cm
Correct Option: B

In-radius =
Area
Semi - perimeter

⇒ 4 =
34
Semi - perimeter

⇒ Semi - perimeter =
34
 = 8.5
4

∴ Perimeter of triangle = (8.5 × 2) cm = 17 cm


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