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KAN SOMEBODY HEPLME #ONSANGRE #ON9INE3REY

Derek wrote the following paragraph proof for the Vertical Angles Theorem:

The sum of angle 1 and angle 4 and the sum of angle 3 and angle 4 are each equal to 180 degrees by the definition of supplementary angles. The sum of angle 1 and angle 4 is equal to the sum of angle 3 and angle 4 by the transitive property of equality. Angle 1 is equal to angle 3 _____________________.

Which phrase completes the proof?
by construction using a straightedge
by the definition of a perpendicular bisector
by the subtraction property of equality
by the vertical angles theorem

KAN SOMEBODY HEPLME ONSANGRE ON9INE3REY Derek wrote the following paragraph proof for the Vertical Angles Theorem The sum of angle 1 and angle 4 and the sum of class=

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Kaikerscupcake
Hey there! :D

It's important to remember that vertical angles are congruent. They are angles that you could draw a line through the vertex, and it would create 2 more equal angles. 

Also, the question even states that "Derek wrote the following paragraph proof for the vertical angles theorem." 

So, the answer is 'the vertical angles theorem".

I hope this helps!
~kaikers

subtraction property of equality (i just took that test and got it right)

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