Trapezoids have exactly one pair of opposite sides that are parallel. Student: So what do you think we call a trapezoid in which the two non- parallel sides are.

Remember, if you see the word quadrilateral, it does not necessarily mean a figure with special properties like a A rectangle has two pairs of opposite sides parallel, and four right angles. Trapezoids only have one pair of parallel sides.

In Euclidean geometry, a convex quadrilateral with at least one pair of parallel sides is referred An acute trapezoid has two adjacent acute angles on its longer base edge, An obtuse trapezoid with two pairs of parallel sides is a parallelogram. . angles sum to 0, as do the cotangents of the other two adjacent angles. :p.
No, because all four sides of a rectangle don't have to. The preponderance of advantages to the inclusive definition of trapezoid has caused all the articles we could find on the subject, and most college-bound geometry books, to favor the inclusive definition. While both definitions are legitimate, the benefit to the inclusive definition is that any theorem proved play free slots for fun only for a trapezoid is also true for a parallelogram. Others regard the parallelogram, with two pairs of parallel sides, as a special type of trapezoid. A polygon is defined as a two-dimensional shape that has straight sides. So when trapezoids start their own party after being kicked out of the quadrilateral party, we can be certain that rectangles, squares, and parallelograms will definitely not be on the guest list.
Trapezoid / Special Notes! </