Really need help . Thanks .
Given line AE and line BD that intersect at point C, the following is an indirect paragraph proof proving that vertical angles ACB and ECD are congruent.

Question

anonymous · Answer

Assume ∠ACB and ∠ECD are not congruent. The Vertical Angles Theorem says that vertical angles must be congruent. Since this contradicts the assumption, vertical angles ACB and ECD are congruent.

Is the indirect proof logically valid? If so, why? If not, why not?

 Yes. Statements are presented in a logical order using the correct theorems.

 Yes. The conclusion was used to contradict the assumption.

 No. The conclusion was used to contradict the assumption.

 No. The progression of the statements is logically inaccurate.

anonymous · Answer

@ganeshie8 @Compassionate  Help please!

anonymous · Answer

@Ashleyisakitty

anonymous · Answer

Can You please help?

anonymous · Answer

Im thinking B or D

nikato · Answer

It's D. Ur just cycling around.the main idea of this proof is actually proving the vertical angle theorem, but ur indirect proof used it as a reason.

anonymous · Answer

Correction it was***No. The conclusion was used to contradict the assumption.*** 
I just took the test