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Triangle ABC is shown below:

Given: ΔABC

Prove: All three angles of ΔABC add up to 180°.

The flowchart with missing reason proves the measures of the interior angles of ΔABC total 180°:

Which reason can be used to fill in the numbered blank space?

A. Associative Property of Addition
B. Triangle Exterior Angle Theorem
C. Angle Addition Postulate
D. Commutative Property of Addition

Triangle ABC is shown below Given ΔABC Prove All three angles of ΔABC add up to 180 The flowchart with missing reason proves the measures of the interior angles class=
Triangle ABC is shown below Given ΔABC Prove All three angles of ΔABC add up to 180 The flowchart with missing reason proves the measures of the interior angles class=

Respuesta :

RachelMcKay

C. Angle Addition Postulate

You are using the angle measurements of angle EBC, angle CBA, and angle DBA to get 180°

I hope this helps!

Answer:

Angle Addition Postulate

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