The inradius of a triangle with sides 7 cm, 24 cm, 25 cm is:
Show answer & explanation
Correct answer: B
Explanation
Sides of the triangle = 7 cm, 24 cm, 25 cm
This is a right-angled triangle.
Semi-perimeter = (7 + 24 + 25) / 2 = 28 cm
Area = (1/2) × 7 × 24 = 84 cm²
Inradius = Area / Semi-perimeter
= 84 / 28
= 3 cm