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Re: Geometry Lesson 116

Dear Liam,


The expression 6:18::10:30 means 6 is to 18 as 10 is to 30, so it's correct. But, as you discovered, it also means 6:18=10:30, two ways of looking at it. Thanks for your observation.



Joan A. Cotter, Ph.D.
RightStart Mathematics by Activities for Learning, Inc.
http://www.alabacus.com

Re: Re: Geometry Lesson 116

Oh! Thanks. I don't remember seeing that symbol before.

Liam