1. a equilateral have 4 equal sides and 4 right angles, “2. a quadrilateral having 4 right angles. its opposite sides are equal.”, “3. a quadrilateral having 2 pairs of parallel sides and its opposite sides are equal.”, 4. a quadrilateral having one pair of opposite sides parallel., a. rhombus, b. square, c. rectangle, d. trapezoid, e. parallelogram