Question

PLEASE CHECK TO SEE IF THIS IS RIGHT
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?
Alternate interior angles are congruent.
Definition of a parallelogram
Same side interior angles theorem
Definition of supplementary angles

Answer 1

:)

Answer 2

What is the answer ? I got Definiton of supplementery is htat right ?

Answer 3

There is no flow chart here with missing reasons so I have no idea. I need the steps that come before the missing reason step. The steps in a proof do not stand alone.

Answer 4

Please tell me is it is Same Side Interior Angles ?

Answer 5

The "Same side interior angles theorem" states that the angles are supplementary.

Definition of supplementary angles states that the sum of the measure is 180 IF you already know the angles are supplementary which you don't in this proof.
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I would answer "Same side interior angles theorem" based on what is here.
Note:
Ii would look in my book and see how the ""Same side interior angles theorem" is phrased.