Question

a _ is a
quadrilateral
with two
pairs of
parallel
sides.

a _ is an
equiangular
quadrilateral
with two
pairs of
parallel
sides.

a _ is a
quadrilateral
with exactly
one pair of
parallel sides
and the
nonparallel
sides are
congruent.

Explanation:

Step1: Analyze the first definition

A quadrilateral with two pairs of parallel sides is a parallelogram. So the first blank should be "parallelogram".

Step2: Analyze the second definition

An equiangular quadrilateral with two pairs of parallel sides: equiangular means all angles are equal (90 degrees for quadrilaterals), and with two pairs of parallel sides, this is a rectangle (which is a type of parallelogram with right angles). So the second blank is "rectangle".

Step3: Analyze the third definition

A quadrilateral with exactly one pair of parallel sides and non - parallel sides congruent is an isosceles trapezoid. So the third blank is "isosceles trapezoid".

Answer:

1. parallelogram
2. rectangle
3. isosceles trapezoid