This is a free lesson from our course in Geometry

 In this lesson, we will look at the formula used to calculate the area of a parallelogram. You will learn it with the help of some examples and practice questions with solution, and watching video as well as explanations by the instructor. The area, A, of a parallelogram is A = BH, where B is the base of the parallelogram and H is its height. The height of a parallelogram is a segment drawn perpendicular to the base from an opposite vertex. In another way the area of a parallelogram is twice the area of a triangle created by one of its diagonals. (More text below video...)
Other useful lessons:
 Area of a Rectangle Area of a Square Area of a Triangle - Areas of Polygons and Circles Area of a Rhombus Area of a Trapezoid Area of a Circle Effect of dimension changes on Area Real World Applications - Area of Polygons and Circles
(Continued from above) For example, if base of a parallelogram is 20 cm and height is 10 cm, then area is given by 20 x 10 = 200 cm2. If base of a parallelogram and its area is known, then height is given by:
height = Area/Base
E.g. if the area of a parallelogram is 100 cm2 and base is 5 cm, then height is 100/5 = 20 cm. Similarly, when height of a parallelogram and its area are known, then base can be calculated by:
base= Area/height
E.g. if the area of a parallelogram is 50 cm2 and height is 10 cm, then base is 50/10 = 5 cm.
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