Write an indirect proof to show that opposite angles of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures. This figure does not need to be submitted. @johnweldon1993

Question

anonymous · Answer

@myininaya I started this off, but could you help me continue it? I just want to make sure I'm doing this correctly.

anonymous · Answer

Here is what I have so far: We have parallelogram ABCD. Angles A and C measure 63 degrees. Angles B and D measure 117 degrees.
Now to start my indirect proof:

anonymous · Answer

I don't know what statement I should use first to contradict or anything. :/