All parallelograms are quadrilaterals.

A trapezoid is a parallelogram.

A square is a rectangle.

Quadrilateral is a three-sided polygon. 

Every rhombus is a trapezoid. 

It is a quadrilateral with only one pair of opposite sides that are parallel. 

It is a parallelogram having 4 equal sides but has no right angles.

It is a parallelogram with 4 right angles. Its opposite sides are equal. 

It is a parallelogram with 4 equal sides and 4 right angles.

It is a quadrilateral with 2 pairs of parallel sides and its opposite sides are equal. 

Which triangle has no equal sides?

Which triangle has three equal sides? 

Which of these triangles has one angle that measures 90 ⁰?

What do you call a triangle with three acute angles?

What do you call a triangle with two equal sides?