Definition: Parallelogram is a quadrilateral in which opposite sides are parallel.
Interactivity 1 - Play with a Parallelogram Directions for interactivity
Click and drag the slider buttons to change the size. Click and drag point B to move and point А to rotate.
|Basic formulas for a parallelogram with sides a and b and height h: perimeter is: L=2(a+b) , and area is: A=ah .
Examples for perimeter and area of parallelograms
Check the following examples using the above interactivity.Notice that the length of "side" b does not affect the area and the height h does not affect the perimeter.
Interactivity 2: Construct a parallelogram Watch Mathcast
(This together with 4 above means that a quadrilateral is a parallelogram if and only if the diagonals bisect each other.)
|Brief||Mathcasts and Interactivities to understand and practice the parallelogram.|
|Grade||7-10 Interactivities start at 7th grade level on up|
|Strand||Geometry and Measurement|
|Standards||CA 7MG.2.1, CA GEO.10, ACT-none|
|Keywords||parallelogram, quadrilateral, quadrangle, construct, geogebra, area, perimeter|
|Author||LFS - contact - website|
|Type||Freeware - Available for Offline and Online Use - Translatable (html)|
|Use||Requires sunJava player|
|Up one level|