Question

The bisector of angle ABC is ray BF. If the measure of angle ABF is 35 degrees, what is the measure of angle ABC?
a. 105 degrees
b. 17 degrees
c. 70 degrees
d. 35 degrees

Answer 1

The bisector divides angle ABC in half. so angle ABF is half of angle ABC. Just multiple the measure of angle ABF by 2. Draw the picture; all will become clear.