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Given the diagram below, Gitta writes m1 + m2 + m3 = 180degrees. Which of the following reasons allows her to write this statement?

A. Triangle sum theorem
B. Subtraction property of equality
C. Definition of linear pair
D. Exterior angles theorem

Respuesta :

meganmrice2005
I believe the answer is A.

Answer:

A. Triangle sum theorem.

Step-by-step explanation:

We have been given that [tex]m\angle 1+m\angle 2+m\angle 3=180^{\circ}[/tex].

We know that angle sum property of triangle states that three angles of a triangle add up-to 180 degrees.

Since the sum of angles of a triangle is 180 degrees, therefore, option A is the correct choice.

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