Quadrilaterals

4. is a quadrilateral with two pairs of parallel sides. The opposite sides of a parallelogram are equal in length, and the opposite angles are equal in measure
5. is a quadrilateral with reflection symmetry across a diagonal
7. is a quadrilateral with one pair of opposite sides parallel.
8. quadrilateral is a four sided shape that can be inscribed into a circle
11. cross known as "crossbuck" is used as the conventional road sign used to indicate the point at which a railway line intersects a road at a level crossing, called a in this context.
12. Quadrilateral: a four-sided shape where no sides are equal in length and no internal angles are the same.
14. are quadrilaterals with 4 congruent sides and 4 right angles, and they also have two sets of parallel sides.
15. trapezoid is a trapezoid in which the top and bottom sides are parallel, while the remaining two non-parallel sides have the same length

1. trapezium is a trapezium in which the non-parallel sides are equal in measure. In other words, the bases are parallel and the legs are equal in measure
2. is a quadrilateral in which all angles are right angles. A rectangle is a parallelogram, so its opposite sides are equal.
3. Describes a quadrilateral or polygon that has a cavity, or a cave.
6. of the quadrilateral bisect each other. The diagonals divide the quadrilateral into two pairs of congruent triangles. The intersection point of the diagonals is also the intersection point of the lines connecting the midpoints of the opposite sides of the quadrilateral (Figure 4).
9. Describes a quadrilateral or polygon that doesn't have a cavity.
10. is a quadrilateral with one pair of parallel opposite sides
13. is a quadrilateral whose all four sides are equal in length and opposite sides are parallel to each other