Question

If BD is the angle bisector of ∠ABC, and ∠ABD = 25°, then what is the measure of ∠ABC ?

• A. 50°
• B. 25°
• C. 60°
• D. 90°

Answer 1

The correct option is A

50°

Since BD is angle bisector of angle ABC,
$\therefore \angle ABC=2\times \angle ABD$

= 2 $\times 25={50}^{\circ }$