Question

In an isosceles triangle, one angle has the angle measure of ${110}^o$. Find sum of two other angles of the triangle.

• A. ${70}^o$
• B. ${30}^o$
• C. ${25}^o$
• D. ${26}^o$

Answer 1

The correct option is A ${70}^o$

Given angle is obtuse angle. And we know only one angle can be obtuse in a triangle. Rest angles of Iscosceles Triangles are actute and equal.

Sum of rest two angles is, ${180}^{\circ }-{110}^{\circ }={70}^{\circ }$

Thus, each angle will be of $\left(\frac{70}{2}\right)$${}^{\circ }$ = ${35}^{\circ }$