Quadrilateral > Parallelogram
Parallelogram
DEFINITION: A parallelogram is ANY quadrilateral that has TWO (2) PAIRS of PARALLEL SIDES that are OPPOSITE AND EQUAL in length (See examples below). Opposite angles are equal but not necessarily right angles. They can be classified into the following three regular shapes:
Lines are said to be PARALLEL if they are always the same distance apart and point in the same direction so that they will never meet.
A QUADILATERAL is a 2D shape with FOUR (4) SIDES and FOUR (4) ANGLES.
INTERESTING FACT: The area of ANY parallelogram (square, rectangle, or rhombus) is the base (bottom line) times the height (base x height).
IMPORTANT NOTE: It is important to note that a parallelogram must have not one but TWO PAIRS OF PARALLEL SIDES.
So all quadrilaterals are not parallelograms. A trapezoid and a kite are not parallelograms because they do not have two pairs of parallel sides.
