Mathematics, 19.06.2020 19:57 BeenPaidGLO
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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 form a triangle.
given
Let DE be a line passing through B and parallel to AC. definition of parallel lines
23 25 and 1 24
m_1 = m_4 and mz3 = m_5
m24+ m_2 + 25 = 180°
angle addition and definition of a straight line
substitution
m_1 + m2 + m23 = 180°
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