2015 · Q54
The area of the largest triangle that can be inscribed in a semicircle of radius r is
Elementary MathematicsGeometry: Lines, Angles and Triangles
- Ar²
- B2r²
- C3r²
- D4r²
Explanation
The largest inscribed triangle has base 2r (the diameter) and height r, area ½·2r·r = r² (option A).