Answer:
Step-by-step explanation:
Sum of interior angles of the triangle is 180°:
- m∠A + m∠B + m∠C = 180°
- 3x + 28° + 5x + 52° + 2x - 10° = 180°
- 10x + 70° = 180°
- 10x = 110°
- x = 11°
Find the measure of angle C:
- m∠C = 2x - 10° = 2(11°) - 10° = 22° - 10° = 12°
