###
Never

A trapezoid is a parallelogram.

###
Always

The diagonals of a rectangle bisect eachother.

###
Sometimes

An equilateral parallelogram is equiangular.

###
Sometimes

The diagonals of a rhombus are equal.

###
Never

There is one right angle in a parallelogram and it is not a rectangle.

###
Always

An equiangular rhombus is a square.

###
Sometimes

The opposite angles of a parallelogram are supplementary.

###
Sometimes

The diagonals of a rectangle are the bisectors of the angles.

###
Always

A square is a rectangle.

###
Never

A trapezoid is a parallelogram.

###
Sometimes

A rhombus is a square.

###
Sometimes

The diagonals of a quadrilateral are perpendicular and the quadrilateral is not a rhombus.

###
Always

The diagonals of a rectangle bisect eachother.

###
Never

The diagonals of a kite are the perpendicular bisectors of each other.

###
Sometimes

The diagonals of a trapezoid are perpendicular.

###
Sometimes

An equilateral parallelogram is equiangular.

###
Sometimes

The angles of a parallelogram are congruent.

###
Never

A kite is a square.

###
Sometimes

The diagonals of a rhombus are equal.

###
Sometimes

An equilateral quadrilateral is a square.

###
Never

There are more than two right angles in a trapezoid.

###
Sometimes

If a quadrilateral has three angles of equal measure, then the fourth angle must be a right angle.

###
Always

The diagonals of an isosceles trapezoid are congrent.

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