Answer:
trapezoid
Explanation:
A quadrilateral with exactly one pair of parallel sides is called a trapezoid. The parallel sides are called the bases, and the other two sides are called the legs.
Trapezoids can be classified into four types:
- Isosceles trapezoid: A trapezoid with two congruent legs.
- Right trapezoid: A trapezoid with one right angle.
- Scalene trapezoid: A trapezoid with no congruent sides or angles.
- Unequal trapezoid: A trapezoid that is neither isosceles, right, nor scalene.