Geometric+Mean-Maggie,+Dana,+Kaitlyn

Maggie R., Dana B., and Kaitlyn F.

Geometric Mean
What is the geometric mean of 2, 4, and 8? First we multiply the three numbers 2 x 4 x 8 = 64. Second, we need to find the cube (3rd root) root of 64. In this case the root is 4. So the geometric mean is 4. The cube root of a number is not easy to calculate. Unless you have a mathematical calculator or a computer or the answer is easy to spot, it will be difficult to calculate the geometric mean of a series of numbers.

This source ^^^ helps briefly teach the steps that will be used to find the geometric mean.- Dana

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This source ^^^ is a video that teaches how to find the geometric mean. Once the video gets to 38 seconds, you may want to stop watching it because we have not learned that part yet. I do recommend watching the video in its entirety though. The video overall is helpful though in explaining how the geometric mean is found.-Dana

MAGGIE RELLIHAN: On this source below it explains through various examples of how to do geometric mean. It takes you step by step the meanings of each component to lead you to the final solution. For example: What is the geometric mean of 3, 3, and 9. To find out, you would first have to multiply them all together. (3x3x9=81) Then you would take the square root of that which gives you 9. So, the result is that the geometric mean is 9 of 3, 3, and 9.

http://mste.illinois.edu/dildine/sketches/meanalt1.html

Kaitlyn Fiola:

This source shows you step by step movements of how to find the geometric mean. You and rotate and look at how the triangles are similar in looks. Each problem gives you the final answer and it is pretty easy to figure out. For example you would first multiply all the numbers together (2x2x4) which equals 16. After you find the product you need to take the square root of that number which comes out to be 4. The solution is 4 of 2, 2, and 4.

http://www.mathwarehouse.com/geometry/similar/triangles/geometric-mean.php