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Complete the proof. help me answer this please!!

Complete the proof. help me answer this please!!-example-1
User Tavalendo
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1 Answer

5 votes

Answer:

2. Definition of supplementary angles

3.
\angle 1 + \angle 2 = \angle 1 + \angle 3

4.
\angle 2 = \angle 3

5. Definition of congruent angles

Explanation:

Required

Fill in the gaps

1. Given

Supplementary angles:
\angle 1 and
\angle 2

Supplementary angles:
\angle 1 and
\angle 3

2. Supplementary angles add up to 180.

So:


\angle 1 + \angle 2 = 180


\angle 1 + \angle 3 = 180

3. Apply transitive property on (2)


\angle 1 + \angle 2 = 180 and
\angle 1 + \angle 3 = 180, then


\angle 1 + \angle 2 = \angle 1 + \angle 3

4. Subtract
\angle 1 from both sides


\angle 1 - \angle 1 + \angle 2 = \angle 1 + \angle 3 - \angle 1


\angle 1 - \angle 1 + \angle 2 = \angle 1 - \angle 1+ \angle 3


\angle 2 = \angle 3

This property is called the subtraction property

5. If
\angle 2 = \angle 3,

Then
\angle 2 and
\angle 3 are congruent

User Rovdjuret
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