2016 · Q62
What is area of largest triangle inscribed in a semi-circle of radius r units ?
Elementary MathematicsCircles
- Ar² square units
- B2r² square units
- C3r² square units
- D4r² square units
Explanation
The largest triangle in a semicircle takes the diameter 2r as its base and the radius r as its greatest height. Its area is (1/2)×2r×r = r². Hence option A.