Question

In a $△ABC$ , measure $\angle A={35}^0$ , measure $\angle B={65}^0$, find measure $\angle C$.

• A. ${60}^0$
• B. ${70}^0$
• C. ${80}^0$
• D. None of these

Answer 1

Answer: (C)

${80}^0$

Given two angles of triangle are $\angle A=35°$ and $\angle B=65°$

By the angle sum property of triangle, sum of all $3$ angles of a triangle is $180°$.

Let third angle be $x$, then

$\angle A+\angle B+\angle C=180°$

$35°+65°+x=180°⟹x=180°-35°-65°$

$⟹x=80°$