Definition of parallelogram

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  • Show me parallelogram
  • Types of parallelogram and its properties!

    Parallelogram

    (Jump to Area of a Parallelogram or Perimeter of a Parallelogram)

    A Parallelogram is a flat shape with opposite sides parallel and equal in length.

    Opposite sides are parallel

    Opposite sides are equal in length

    Opposite angles are equal (angles A are the same, and angles B are the same)
    Angle A and angle B add up to 180°, so they are supplementary angles.

    Play with a Parallelogram:

    images/geom-quad.js?mode=parallelogram

    NOTE: Squares, Rectangles and Rhombuses are all Parallelograms!

    Example:

    A parallelogram where all angles are right angles is a rectangle!

    Area of a Parallelogram

     

    The Area is the base times the height:

    Area = b × h

    (h is at right angles to b)

    Example: A parallelogram has a base of 6 m and is 3 m high, what is its Area?

    Area = 6 m × 3 m = 18 m2

    Perimeter of a Parallelogram

    The Perimeter is the distance around the edges.

     

    The Perimeter is 2 times the (base + side length):

    Perimeter = 2(b+s)

    Example: A parallelogram has a base of 12 cm and a side

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