Question

If two angles of a triangle are ${50}^{\circ }$​ and ${70}^{\circ }$​, then the third angle is:

• A. 50^o
• B. 70^o
• C. 60^o
• D. 120^o

Answer 1

The correct option is C

60^o

The sum of all the angles of a triangle is ${180}^{\circ }$ .

Therefore, third angle

$=180-(50+70)=180-120={60}^{\circ }$