It has two obtuse angles

It has two pairs of parallel sides

It has two angles that measure less than 90 degrees

It has two pairs of perpendicular sides

Group A has figures with only right angles. Group B has figures with only obtuse angles.

Group A has figures with both parallel and perpendicular sides. Group B has figures with no perpendicular sides.

Group A has figures with only parallel sides. Group B has figures with only perpendicular sides.

Group A has figures with only right angles. Group B has figures with only acute angles.

Acute triangle

Obtuse triangle

Right triangle

Regular triangle

A parallelogram, because there are two sets of parallel sides

A rectangle, because there are four right angles

A trapezoid, because there is only one pair of parallel sides

A rhombus, because there are four sides of equal length

A square

An obtuse triangle

A rectangle

A parallelogram