Exams › SSC CGL (Prelims) › General

If the three interior angles of a triangle are in the ratio 1 : 2 : 3, what type of triangle is it?

1. Isosceles triangle
2. Equilateral triangle
3. Right-angle triangle
4. Obtuse-angle triangle

Correct answer: Right-angle triangle

Solution

Sum of angles in a triangle = 180 degrees. With ratio 1:2:3, the angles are (1/6)x180=30, (2/6)x180=60, (3/6)x180=90 degrees. Since one angle is exactly 90 degrees, it is a right-angle triangle.

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