John Conway has suggested the word "strombus" derived from the Greek word for a spinning top for this type of polygon. These shapes have a single reflective symmetry across one of their diagonals, and concave shapes with similar definitions are sometimes called darts or arrowheads. Not generally parallelograms, their area can be computed by taking one half the product of the diagonals, which are perpendicular to each other though only one is necessarily a bisector. Give the name of this type of quadrilateral that has tw
John Conway has suggested the word "strombus" derived from the Greek word for a spinning top for this type of polygon. These shapes have a single reflective symmetry across one of their diagonals, and concave shapes with similar definitions are sometimes called darts or arrowheads. Not generally parallelograms, their area can be computed by taking one half the product of the diagonals, which are perpendicular to each other though only one is necessarily a bisector. Give the name of this type of quadrilateral that has two pairs of congruent adjacent sides.
John Conway has suggested the word "strombus" derived from the Greek word for a spinning top for this type of polygon.