Ratio and proportion
Date: Mon, 5 Dec 1994 19:27:47 -0600 (CST) From: Thelma Ann Gonzalez Subject: Math Help I am a student taking Geometry. I need extra help in ratio and proportion. I would appreciate it if you would write back with examples. Thanks, Adriana Gonzalez
Date: Mon, 5 Dec 1994 22:08:58 -0500 (EST) From: Dr. Sydney Subject: Re: Math Help Dear Adriana: Thanks for writing Dr. Math! I'm not sure what kind of examples of ratios you were thinking of, but I'll throw out a few for you to think about. Putting two numbers in a ratio gives you a sense of the relative sizes of two numbers. For instance if I want to know the ratio of 200 to 100 I say it is 200/100 = 2. That means 200 is twice the size of 100. Proportionality is very related to ratios. If I have a triangle with sides 3, 4, and 5, and I have another triangle with sides in proportion to the first triangle, the second triangle's sides must have the same ratio with one another as in the first triangle. So, for instance, a triangle with sides 6, 8, 10 is proportional to the triangle of sides 3, 4, 5 because its sides are exactly twice as big as the first triangle. I hope this helps answer your question. Please feel free to write back if you have any other questions. --Sydney, Dr. Math
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