Mackenzie 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 _________________. Angle 1 is equal to angle 3 by the subtraction property of equality.

Which phrase completes the proof?

A. by construction using a straightedge
B. by the definition of a perpendicular bisector
C. by the transitive property of equality
D. by the vertical angles theorem

Question

Mackenzie 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 _________________. Angle 1 is equal to angle 3 by the subtraction property of equality.

Which phrase completes the proof?

A. by construction using a straightedge
B. by the definition of a perpendicular bisector
C. by the transitive property of equality
D. by the vertical angles theorem

anonymous · Answer

attachment

anonymous · Answer

please help!! will fan and medal :(