Question

A triangle whose two angles measure ${25}^{\circ }$ and ${35}^{\circ }$ is ___ triangle.

• A. An acute angle
• B. An obtuse angle
• C. A right angle
• D. An equilateral

Answer 1

The correct option is B

An obtuse angle

We know, the sum of angles of a $\Delta ={180}^{\circ }$.

$\therefore$ if two angles measure ${25}^{\circ }$ and ${35}^{\circ }$, the third angle measures

$({180}^{\circ }-{25}^{\circ }-{35}^{\circ })={120}^{\circ }$.

Hence the triangle is an obtuse angle triangle.