2017 · Q72
The angles of a triangle are in the ratio 2:4:3. The smallest angle of the triangle is
Elementary MathematicsGeometry: Lines, Angles and Triangles
- A20°
- B40°
- C50°
- D60°
Explanation
This is an angle-sum ratio problem. The parts 2 + 4 + 3 = 9 correspond to 180°, so each part is 20°. The smallest angle is 2 parts = 40°. Option (a) 20° is the trap — it is one part, not the smallest angle. Hence option (b).