Quadrilaterals

No angles in an isosceles trapezoid are congruent.

If a parallelogram is a rectangle, then the diagonals are congruent.

A midsegment of a trapezoid is a segment that connects any two nonconsecutive vertices.

The base of a trapezoid is one of the parallel sides.

The diagonals of a rhombus are perpendicular.

The diagonal of a trapezoid is the segment that connects the midpoints of the legs.

A rectangle is not always a parallelogram.

A quadrilateral with only one set of parallel sides is a parallelogram.

Explain how to prove that a given parallelogram is a square.

Explain how to determine the number of sides in a regular polygon given the measure of one of its interior angles.