Geometry and TrigonometryVery hardAngle from two relationships in a triangle
Geometry and Trigonometry practice question
In triangle ABC, the measure of angle A is twice the measure of angle B, and the measure of angle C equals the sum of the measures of angles A and B. What is the measure, in degrees, of angle C?
Answer: 90
With B = x: A = 2x and C = 3x, so 6x = 180, x = 30, and C = 90.
Common wrong answers
- If you answered 30
- 30 is angle B.
- If you answered 60
- 60 is angle A.
- If you answered 120
- 120 adds A and C.
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