3 Vocabulary Quadrilateral: A polygon with 4 sides. Consecutive angles: Two angles whose vertices are endpoints of a side.Opposite angles: Two angles that are not consecutive angles.ABDC
4 Parallelogram Characteristics of a parallelogram: Opposite sides are parallel.Opposite sides are congruent.Opposite angles are congruent.Consecutive angles are supplements.Diagonals bisect each other.
5 Rectangle A parallelogram with four right angles. The diagonals of a rectangle are congruent.
6 Rhombus A parallelogram in which all sides are of equal length. The diagonals of a rhombus are perpendicular to each other.The diagonals of a rhombus bisect its angles.
7 SquareA rectangle in which all sides are of equal length.
8 Trapezoid What is a trapezoid? A quadrilateral in which only one pair of opposite sides are parallel.
9 Isosceles TrapezoidA trapezoid in which the nonparallel sides are equal.
10 KiteA kite is a quadrilateral with two pairs of adjacent sides congruent and no opposite sides congruent.