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 Angle Bisector:  A segment or ray that shares a common endpoint with an angle and divides the angle into two equal parts.

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

Angle Bisector: Explore relationships of parallelograms and angle bisectors.

Inscribed quadrilateral: Do the angle bisectors of the opposite sides of an inscribed quadrilateral meet at right angles?

Angle Bisector: Given a triangle and an angle bisector, determine proportions comparing the lengths of the various segments that form the triangle.