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An exterior angle of a triangle is 120°. If one interior opposite angle is 50°, the other interior opposite angle is:

Competition practiceGeometry
  • A60°
  • B70°
  • C80°
  • D50°

Step-by-Step Solution

An exterior angle equals the sum of the two interior opposite angles: 120 − 50 = 70°.
Answer: B) 70°

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