Question

Which of the following sets of angles can form a triangle?

• A. 40°, 60°, 90°
• B. 120°, 40°, 30°
• C. 80°, 45°, 55°
• D. 90°, 45°, 55°

Answer 1

The correct option is C 80°, 45°, 55°

The sum of angles in a triangle is 180°.
Let’s calculate the sum of angles for all options.
Option A: 120° + 40° + 30° = 190°

Option B: 90° + 45° + 55° = 190°

Option C: 80° + 45°+ 55° = 180°

Option D: 40° + 60° + 90° = 190°

Therefore, 80°, 45°, and 55° can form a triangle.