Tween the measures of the interior There is a
angles of a triangle
Draw a triangle and cut it out. Label the angles A, B, and C.
B Tear off each "corner" of the triangle. Each corner includes the
vertex of one angle of the triangle.
B
Arrange the vertices of the triangle around a point so that none
of your corners overlap and there are no gaps between them.
What do you notice about how the angles fit together around a point?
across
What is the measure of a straight angle? Corresponding
Describe the relationship among the measures of the angles of AABC.
goes straight
The Triangle Sum Theorem states that for AABC, MZA+mZB+ m2C=