PinkMarron PinkMarron

23-01-2022
Mathematics

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I need help with #20 please! It’s a 2 column proof and I’m just not sure how to answer it.

I need help with 20 please Its a 2 column proof and Im just not sure how to answer it class=

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jen4755 jen4755

23-01-2022

Answer:

Step-by-step explanation:

1. Angle 3 is congruent to Angle 4 1. Given

2. Angle 3 is linear pair with Angle BAC 2. Definition of linear pair

3. Angle 4 is linear pair with Angle BCA 3. Definition of linear pair

4. Angle BAC is congruent to Angle BCA 4. Both are linear pairs to congruent angles

5. Triangle BAC is isosceles 5. Triangle has 2 congruent angles

6. AB is congruent to BC 6. Opposite side of congruent angles are congruent

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