Are some rectangles trapezoids?

A trapezoid is a quadrilateral with at least one pair of opposite sides parallel to each other.” By this definition, all rectangles, actually all parallelograms are trapezoids. read more

This implies that rectangles and trapezoids are non-intersecting categories, which would make the original statement FALSE. On the other hand, IF your book says that a trapezoid has "at least" one pair of parallel sides, then all rectangles are trapezoids, so certainly "some" rectangles are trapezoids, and thus the original statement is TRUE. read more

A trapezoid is defined (in North America) to be a quadrilateral that has exactly one pair of parallel sides. (This object is called a trapezium in British English.) A quadrilateral with two pairs of parallel sides is called a parallelogram; a parallelogram with right angles is a rectangle. read more