Select the correct answer from each drop down menu. Points A B and Cform a triangle. Complete the statements to prove that the sum of the interior angles of AABC is 180°
Reason
Statement
Points A B, and form a triangle.
Let De be a line passing through Band parallel to AC
23 - 25 and 21 e 24
given
definition of parallel lines
m21 = m 24 and m23 = m25
m24+ m22+ m25 = 180°
m21+ m2 2 + m 23 = 180°
ght line
Alternate Intenor Angles Theorem
Alternate Exterior Angles Theorem
Reset Corresponding Angles Theorem
Congruent angles have equal measures.

First drop down
Alternate interior angles theorem
Alternate exterior angles theorem
Corresponding angles Theorem
Congruent angles have equal measures

Second drop down
Alternate interior angles theorem
Alternate exterior angles theorem
Corresponding angles Theorem
Congruent angles have equal measures