Select the correct answer. Given: AABC
Prove: The sum of the interior angle measures of AABC is 180°.
D
B
E
4/2
5
1
3 с
А
Reason
Statement
1. Let points A, B, and C form a
triangle.
given
2. Let DĚ be a line passing
through B, parallel to AC,
with angles as labeled.
defining a parallel line and labeling angles
3.
4. m 1 = m 4, and
m23 = m_5.
Congruent angles have equal measures.
1 ono
analo oddition and definition of actrnicht analo