1.

PQR is an equilateral triangle of side 11 cm. Find the radius of incircle.1. 6.5/√3 cm2. 7.5/√3 cm3. 11/√3 cm4. 5.5/√3 cm

Answer» Correct Answer - Option 4 : 5.5/√3 cm

Given

Side of an equilateral triangle = 11 cm

Concept

Radius of incircle of equilateral triangle = Side/2√3

Calculation

Radius of circle = 11/2√3 cm

Radius of circle = 5.5/√3 cm



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