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Svetach [21]
3 years ago
12

What would be the reasons for lines 3 and 4? A. Addition property; subtraction property B. Addition property; solve C. Substitut

ion property; subtraction property D. Substitution property; prove

Mathematics
2 answers:
Vesna [10]3 years ago
7 0

Answer:

C

Step-by-step explanation:

We are given that angle 1 and angle 2 are supplementary angles.

m\angle 1=128^{\circ}

We  have to find the reason for line 3 and 4.

1.Angle 1 and angle 2 are supplementary angles

m\angle 1=128^{\circ}

Reason:Given

2.m\angle 1+m\angle2=180^{\circ}

Reason:Definition of supplementary angles.

3.128^{\circ}+m\angle 2=180^{\circ}

Reason:Substitute property

4.m\angle 2=180-128=52^{\circ}

Reason:Subtraction property of equality

Hence, option  C is true.

m_a_m_a [10]3 years ago
5 0

Answer:

I chose

D. Substitution property; prove

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