LEVEL+TWO+CCSL

Quadrilateral __ Important Property: __ Has four sides __ Why this property? __ This property differentiates a quadrilateral from other polygons such as a triang e, pentagon, hexagon, heptagon, octagon, nonagon, and other polygons with more than 4 sides.

Trapezoid __ Important property __ At least one pair of sides is parallel. __ Why this property? __ This property distinguishes trapezoid from other quadrilaterals, especially a parallelogram. Parallelogram has two parallel side pairs, but trapezoid has one.

Rhombus __ Important property __ All sides are equal __ Why this property? __ This property distinguishes rhombus from a kite, rectangle, and a trapezoid. Other than rhombus and square, there is no other shape with congruent four sides. Thus this property isolates rhombus, and square, which is a type of rhombus, from other quadrilaterals.

Rectangle __ Important Property: __ All angles are right angles. __ Why this property? __ This property isolates rectangle from a trapezoid and a kite because neither trapezoid nor kite have four perpendicular angles. Although this property is true for square, square is one type of rectangle. Thus, this property distinguishes rectangles.

Kite __ Important property __ Opposite sides are not congruent. __ Why this property? __ This is the property that distinguishes kite from a rhombus and square that have four equal sides. Also, it isolates kite from a trapezoid, which could be isosceles (but kite cannot be isosceles).

Square __ Important Property: __ All four sides are congruent All four angles are right angles.  __ Why this property? __ This property distinguishes a square from a rectangle because a rectangle has different adjacent sides.