Question

If two angles in a triangle are 75${}^{\circ }$ and 95${}^{\circ }$ then the third angle is__

• A. 30${}^{\circ }$
• B. 20${}^{\circ }$
• C. 10${}^{\circ }$
• D. 40${}^{\circ }$

Answer 1

Answer: (C)

10${}^{\circ }$

Because by angle sum property, the sum of angles is ${180}^o$.

Let n be the third angle.

$\therefore 75{}^{\circ }$+ 95${}^{\circ }$+ n = 180${}^{\circ }$
$\Rightarrow$ n =10${}^{\circ }$
$\therefore$ Third angle = 10${}^{\circ }$