Question

What reason can be used to complete this proof?


m∠1=m∠3 because ∠1≅∠3.

m∠1+m∠2=m∠CXB and m∠2+m∠3=m∠AXD _________.

m∠1+m∠2=m∠AXD because you can substitute m∠1 for m∠3.

m∠CXB=m∠AXD by the transitive property of equality.

So, ∠AXD≅∠CXB.


I attached screenshot of picture and answer choices. Please include the EXPLANATION in your answer!

Answer 1

Answer:

m∠1=m∠3 because ∠1≅∠3.

m∠1+m∠2=m∠AXD because you can substitute m∠1 for m∠3.

m∠CXB=m∠AXD by the transitive property of equality.

Answer 2

Answer:

by the angle addition postulate

Step-by-step explanation:

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