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2 years ago

B

Mathematics

1 answer:

qwelly [4]2 years ago

3 0

Answer:

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

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