Question

The figure below shows a parallelogram ABCD.

The flow chart with missing reason proves that consecutive angles of a parallelogram add to 180°.
Which reason can be used to fill in the blank spaces?

Definition of a parallelogram

Alternate interior angles are congruent.

Same side interior angles theorem

Definition of supplementary angles

Answer 1

When you add two angles and the result is 180, you have shown that the two angles are supplementary.


So in these next two steps, you're using the "Definition of supplementary angles" to show that the sums of these angles is 180 degrees.

Answer 2

thanks<3

Answer 3

anytime