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Opposite angles in a parallelogram will always be congruent. The opposite lengths will also be congruent. There are two pairs of parallel sides to create a quadrilateral.

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A parallelogram is a four sided shape consisting of two pairs of parallel sides

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Opposite angles are congruent in a parallelogram. The measure of the angles add up to 360 degrees.

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Opposite angles are congruent in a parallelogram. The measure of the angles add up to 360 degrees.

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the diagonals of a parallelogram bisect each other.

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the diagonals of a parallelogram bisect each other 

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the diagonals of a parallelogram bisect each other 

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all interior angles are equual to 360 degrees and the consecutive angles are supplementary

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A parallelogram is a four-sided quadrilateral polygon with two pairs of parallel sides that are not consecutive. The figure below is a parallelogram.

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Each diagonal of a parallelogram separates it into two congruent triangles.

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consecutive angles are always supplementary.

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A quadrilateral with two pairs of parallel lines, angles equal to 360, consecutive angles are supplementary.

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all sides of the shape have to mach the opposite side.
the angles add up to 360. the angles that are opposite of each other are the same. the consecutive angles always add up to 180. the diagonals bisect one another.

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There are two pair of parallel sides.

Opposite sides and angles are congruent or else it's not a parallelogram.

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- two pairs of parallel lines
- quadrilateral
-opposite sides are congruent
-all interior angles are equal to 360 degrees
-consecutive angle are supplementary
- diagonals bisect one another

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This is a parallelogram. We know this because because the two pairs of parallel segments are congruent. Also, the two angles that are opposite to each other are congruent. They also all add up to 360.
They diagonals bisect each other. Also, they are not congruent. If they were, the shape would have to be a rectangle.

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all sides of the shape have a parallel partner
a quadrilateral with two parallel sides
Opposite sides/angles are congruent

All Angles together =360

Supplementary angles =180

Diagonals bisect each other