A four-sided shape with straight sides and at least one pair of opposite sides parallel is called what?

A four-sided shape with straight sides and at least one pair of opposite sides parallel is called what?

• A. Square
• B. Trapezoid
• C. Rectangle
• D. Rhombus

Answer: (B)

A four-sided shape with straight sides and at least one pair of opposite sides parallel is classified as a trapezoid. This definition is key because trapezoids specifically have only one pair of parallel sides, distinguishing them from other quadrilaterals. While squares, rectangles, and rhombuses do have pairs of parallel sides, they are more specific types of quadrilaterals: squares and rectangles have two pairs of parallel sides, and in addition, squares have equal sides and right angles, while rectangles have opposite sides that are equal in length and only right angles. A rhombus also has two pairs of parallel sides and equal-length sides, but does not necessarily have right angles. Therefore, the nature of the trapezoid being defined by just one pair of parallel sides makes it the correct answer in this context.

A four-sided shape with straight sides and at least one pair of opposite sides parallel is classified as a trapezoid. This definition is key because trapezoids specifically have only one pair of parallel sides, distinguishing them from other quadrilaterals.

While squares, rectangles, and rhombuses do have pairs of parallel sides, they are more specific types of quadrilaterals: squares and rectangles have two pairs of parallel sides, and in addition, squares have equal sides and right angles, while rectangles have opposite sides that are equal in length and only right angles. A rhombus also has two pairs of parallel sides and equal-length sides, but does not necessarily have right angles. Therefore, the nature of the trapezoid being defined by just one pair of parallel sides makes it the correct answer in this context.