Question

If the angles of a triangle are 30°, 30° and 120°, then the triangle is ___.

• A. an acute angled triangle
• B. an obtuse angled triangle
• C. a right angled triangle
• D. a equilateral triangle

Answer 1

The correct option is B

an obtuse angled triangle

A triangle with one obtuse angle is called an obtuse angled triangle.

Here, one angle is 120° which is an obtuse angle (more than 90° and less than 180°).

Hence, the triangle is an obtuse angled triangle.