Finding Area and VolumeDate: 04/12/2001 at 19:20:06 From: Brandi Subject: Finding the Volume of Triangles How do I know what to divide the B (base) by? For example, I Have 7.5 for the base and 3 for the height. Do I multiply it by 1/2 or 1/3? Date: 04/13/2001 at 12:39:51 From: Doctor Peterson Subject: Re: Finding the Volume of Triangles Hi, Brandi. The formula for the area (not volume!) of a triangle, which you can find in our Dr. Math FAQ (see Formulas), is: A = 1/2 b h This means you multiply the base length by the height, and divide by 2. The formula for volume of a PYRAMID is similar, but different: V = 1/3 B h Here you multiply the AREA of the base by the height and divide by 3. Just remember, for a two-dimensional thing that comes to a point, I divide by 2; for a three-dimensional thing that comes to a point, I divide by 3. - Doctor Peterson, The Math Forum http://mathforum.org/dr.math/ |
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