Angle Bisectors

Front

What is an angle bisector?

Back

An angle bisector is a line or ray that divides an angle into two equal parts.

Front

If a ray bisects an angle, what can be said about the measures of the two angles formed?

Back

The two angles formed are equal in measure.

Front

What is the relationship between the angles formed by an angle bisector and the original angle?

Back

The sum of the two angles formed by the angle bisector is equal to the measure of the original angle.

Front

If angle DBC measures 14°, what is the measure of angle DBA if DB bisects angle ABC?

Back

28°.

Front

Back

44°.

Front

If angle ABC measures 34°, what is the measure of angle CBD if AB bisects angle ABC?

Back

34°.

Front

Back

22°.

Front

Back

Front

What is the formula to find the measure of an angle when given its bisector?

Back

Front

How do you determine if a line bisects an angle?

Back

If the two angles formed by the line are equal, then the line bisects the angle.