<P> In Euclidean geometry , a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid ( / ˈtræpəzɔɪd / ) in American and Canadian English but as a trapezium ( / trəˈpiːziəm / ) in English outside North America . The parallel sides are called the bases of the trapezoid and the other two sides are called the legs or the lateral sides ( if they are not parallel ; otherwise there are two pairs of bases ) . A scalene trapezoid is a trapezoid with no sides of equal measure , in contrast to the special cases below . </P>
<P> In Euclidean geometry , a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid ( / ˈtræpəzɔɪd / ) in American and Canadian English but as a trapezium ( / trəˈpiːziəm / ) in English outside North America . The parallel sides are called the bases of the trapezoid and the other two sides are called the legs or the lateral sides ( if they are not parallel ; otherwise there are two pairs of bases ) . A scalene trapezoid is a trapezoid with no sides of equal measure , in contrast to the special cases below . </P>
when can a quadrilateral also be called a trapezoid
when can a quadrilateral also be called a trapezoid
a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid
a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid