Geometry shape formed by two rays (initial and ending sides of the angle) that share a common endpoint called the vertex. You may name an angle using the vertex, or a point in each ray and the vertex label in the center.
Trapezoid with two non-congruent and non-parallel sides.
Parallelogram with two pairs of adjacent sides congruent and without opposite sides congruent.
Any quadrilateral with two pairs of opposite sides parallel.
It is a closed plane figure with a least three straight segments as sides.
A four-sided polygon.
Any parallelogram that has 4 right angles.
Any parallelogram with 4 congruent sides.
Parallelogram with four congruent sides and four congruent angles.
Quadrilateral with exactly one pair of parallel sides.
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