Engineering Board Exam Reviewer · Triangles · easy

In triangle ABC, angle A=50° and angle B=70°. Find angle C and classify the triangle as acute, right, or obtuse.

  1. C=60°, acute
  2. C=70°, right
  3. C=50°, obtuse
  4. C=60°, obtuse

Answer

A. C=60°, acute

Solution

C=180°-50°-70°=60°. All three angles are less than 90°, so the triangle is acute.

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