how is the formula for the area of a parallelogram is derived from that of a rectangle.

Question

anonymous · Answer

Drop an altitude down from a vertex of one of the top obtuse angles.
Remove the right triangle formed and fit in on the other side to product a rectangle with the same base and height.

anonymous · Answer

you can cut out the edges of the paralellogram so that you're left with a rectangle in the middle and two right angle triangles which can be put together to form a square. Tack on the square to one side of the newly formed rectangle and you have a rectangle with the same area as your original paralellogram.

anonymous · Answer

http://www.mathopenref.com/parallelogram.html

experimentx · Answer

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