The inradius of an equilateral triangle of side 42 cm is
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Radius of equilateral triangle = 42 cm
Area = root 3 /4 (side)^2
= root 3 /4 × 42 × 42
= 441 root 3
Area = root 3 /4 (side)^2
= root 3 /4 × 42 × 42
= 441 root 3
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