If the circumradius of an equilateral triangle be 10 cm, then the measure of its in-radius is
A. 5 cm
B. 10 cm
C. 20 cm
D. 15 cm
Answer: Option A
Solution(By Examveda Team)
According to question,Circumradius of an equilateral triangle
IR = 10 cm
AO = IR = 10 cm
DO = Ir = ?
2 units → 10 cm
1 unit → 5 cm
∴ DO = Ir = 5 cm
This Question Belongs to Arithmetic Ability >> Triangles
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