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 Parallelogram:  A quadrilateral with opposite sides that are parallel.

Relationships: Explore various relationships in a given construction involving a parallelogram.

Angle Bisector: Explore relationships of parallelograms and angle bisectors.

Inscribed Parallelogram: What must be true about a parallelogram that is inscribed in a circle?

Triangle Inside a Parallelogram: Determine the probability that a point inside a triangle will also be in a parallelogram.

Slicing a parallelogram: Explore the relationships of line segments when the area of a parallelogram is halved.