Question

Which of the following conditions in a quadrilateral proves it is a parallelogram?

Answer 1

Opposite sides are parallel

Opposite sides are equal in length

Opposite angles are equal (angles "a" are the same, and angles "b" are the same)
Angles "a" and "b" add up to 180°, so they are supplementary angles.

Answer 2

So its not A or B ?

Answer 3

What are your answer choices?

Answer 4

A.
One pair of opposite sides are congruent.

B.

One angle is supplementary to both consecutive angles.


C.

One pair of opposite angles are congruent.


D.

The diagonals are congruent.

Answer 5

it is not a, both pairs of opposite sides are congruent

Answer 6

b is true

Answer 7

the diagonals of a parallelogram aren't always congruent

Answer 8

the answer is b then

Answer 9

Thanks I needed the help .

Answer 10

Your welcome