| A | B |
|---|
| Isosceles trapezoid | A pair of parallel line connected by two congruent lines |
| Trapezoid | A quadrilateral with exactly one pair of parallel lines |
| Kite | Convex quadrilateral with no parallel sides, but two sets of adjacent congruent sides |
| Deltoid | Concave quadrilateral with no parallel sides, but two sets of adjacent congruent sides |
| Quadrilateral | Four sided closed plane figure |
| Polygon | Closed plane figure formed by three or more side line segments |
| Trapezium | Quadrilateral with no parallel sides |
| Parallelogram | Quadrilateral with opposite sides parallel |
| Rhombus | Quadrilateral with opposite sides parallel and all four sides congruent |
| Rectangle | Quadrilateral with opposite sides parallel and congruent with four 90 degree angles |
| Square | Quadrilateral with opposite sides parallel, all four sides congruent, and with four 90 degree angles |
| Diagonal | A line segment that connects non consecutive vertices |
| Bisector of a segment | A line, segment, ray, or plane that intersects the segment at its midpoint |
| Perpendicular | Two lines, segments, rays, or planes that intersect to form right angles |
| Quadrilateral | a four-sided closed plane figure |
| A parallelogram is named by naming its | four vertices in any order |
| Opposite side and angles of a parallelogram are | congruent |
| A rectangle is | an equiangular parallelogram |
| A rhombus is | an equilateral parallelogram |
| A square is | a regular parallelogram |
| The diagonals of a parallelogram | bisect each other |
