If the angles, in degrees, of a triangle are x, 3x + 20 and 6x, the triangle…
2019
If the angles, in degrees, of a triangle are x, 3x + 20 and 6x, the triangle must be
- A.
Obtuse
- B.
Acute
- C.
Right
- D.
Isosceles
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Correct answer: A
The angles are x, 3x + 20 and 6x. Their sum is 180, so 10x + 20 = 180 and x = 16. The angles are 16, 68 and 96 degrees. Since one angle is greater than 90 degrees, the triangle is obtuse.