B
5
E
4
Points A, B, and Cform a triangle. Complete the statements to prove that...
Mathematics, 11.12.2020 07:10 Jenifermorales101
B
5
E
4
Points A, B, and Cform a triangle. Complete the statements to prove that the sum of the interior angles of AABC is 180°.
Statement
Reason
Points A, B, and C form a triangle.
given
Let DE be a line passing through B and parallel to AC. definition of parallel lines
23 – 25 and 21 - 24
m21 = m 24 and 23 = m25
m24+ m2 2 + 25 = 180°
mZ1 + Z2 + m23 = 180°
angle addition and definition of a straight line
substitution
Answers: 2
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