Question

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Answer 1

Answer:

x+2x+120 = 180

3x = 60

x = 20°

so angleA = 20°

angleC = 40°

Answer 2

Answer:

∠A = 20°

∠C = 40°

Step-by-step explanation:

∠B = 120°

∠C = 2x

∠A = x

2x + x + 120° = 180° (Angle Sum Property of triangle)

3x + 120° = 180°

3x = 180° - 120°

3x = 60°

x = 60°/3

x = 20°

Hence, ∠A = x

= 20°

∠C = 2x

= 2 × 20°

= 40°