A ________________ is a quadrilateral with both pairs of opposite sides parallel.

The _____________ of a parallelogram bisect each other.

____________ angles in a parallelogram are ____________

A _______________ is a quadrilateral with four right angles.

The sum of the angle measures of a hexagon is ________.

If a quadrilateral is both a rhombus and a rectangle, the it is a _______.

If the diagonal of a parallelogram are _____________, then the parallelogram is a rhombus.

Both pairs of base angles of an ___________ trapezoid are congruent.

The _______________ of a trapezoid is parallel to the bases, and its measure is one-half the sum of the measures of the bases.

If a polygon is convex, then the sum of the measures of the exterior angles, on at each vertex, is ______.

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