A trapezoid is a quadrilateral with at least one pair of parallel sides. The number of congruent sides in a trapezoid depends on its type:
- Isosceles Trapezoid: This type of trapezoid has one pair of parallel sides and the non-parallel sides (legs) are congruent. Therefore, an isosceles trapezoid has two congruent sides.
- Regular Trapezoid: A regular trapezoid has only one pair of parallel sides, and the non-parallel sides are not congruent. Thus, a regular trapezoid does not have any congruent sides.
In summary, the number of congruent sides in a trapezoid can be either two (in the case of an isosceles trapezoid) or none (in the case of a regular trapezoid).