2 Activity On a sheet of paper, draw a segment and label it segment AB. Draw another segment starting at B and ending at C (to make an angle).Fold the paper so that segment AB is on top of segment BC.Use a protractor to measure all the angles involved. What do you notice?
3 VocabularyAngle Bisector – a segment, ray, line, or plane that intersects an angle into two congruent angles.Bisect – a verb meaning to divide in half (two congruent pieces)ABCDbisects
4 Ray BD bisects angle ABC. Find Example 1Ray BD bisects angle ABC.FindADBC