Materials: Marker, Paper, Ruler

Activity: With a ruler, draw on a piece

of paper. Fold the paper so B is on top of

A. Label the point where the fold

intersects as M. Measure and

. What do you notice?

AB

AMABMB

Materials: Marker, Paper, Ruler, Protractor

Activity: Draw on a piece of paper

with a straight edge. Fold the paper so

is on top of . Draw any point on

the fold and label it D. Connect .

With a protractor, measure and

. What do you notice?

ABC

BA

DBC

BC

ABDBD

In the first activity, you discovered a midpoint / segment bisector. Go back 2

slides if necessary (backspace).

ABMBAM because M is the midpoint /

segment bisector of .

In the second activity, you discovered an angle bisector. Go back 2 slides if

necessary (backspace).

BDBCABD because is the angle bisector of .

BD

Do not do anything else!

Wait for further instruction.