Area of a ParallelogramDate: 01/07/99 at 16:44:39 From: Matthew Colon Subject: Math Do you know how to find the area of parallelograms? Thanks! Date: 01/08/99 at 08:55:28 From: Doctor Peterson Subject: Re: Math Hi, Matthew. Take a deck of cards and look at it on end: ----------------------- --- ----------------------- ^ ----------------------- | H ----------------------- v ----------------------- --- | | |<---------B--------->| You should know the area of the rectangle you see: B times H, where B is the length of the base, and H is the height. Now slide the deck over so it looks like this: ----------------------- --- ----------------------- ^ ----------------------- | H ----------------------- v ----------------------- ------- | | |<---------B--------->| It still has the same base and the same height, and the area is still the same since it's made of the same cards. So the area of a parallelogram is the same as the area of a rectangle: B x H. The difference is that you have to be very careful about measuring the height, since it is not measured along the edge, but is perpendicular to the base. - Doctor Peterson, The Math Forum http://mathforum.org/dr.math/ |
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