GeometryQuestion 422 of 550

A triangle has two interior angles of 55° and 65°. What is the exterior angle at the third vertex?

  1. 120°
  2. 60°
  3. 110°
  4. 130°
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Correct answer: 120°

An exterior angle equals the sum of the two remote interior angles: 55 + 65 = 120°.

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Questions last reviewed: 21 October 2026