In a triangle, the angles are A, B, and C. Angle A is twice angle B, and angle C is 30 degrees less than angle A. What are the angles?
Category: Brain Teasers · Difficulty: expert
Hint: Use the sum of angles in a triangle.
Answer
40°, 20°, 120°
Explanation
A + B + C = 180°. Setting A = 2B and C = A - 30, we find A = 120°, B = 40°, C = 20°.
This is a expert brain teasers riddle — one of the harder riddles here. The answer is 40°, 20°, 120°.
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