Alternate Exterior AnglesDate: 06/03/2002 at 15:45:58 From: S.B. Subject: Geometry definitions Dear Dr. Math I have been trying to find out what exterior alternate angles are for hours! My teacher assigned us a vocabulary sheet for geometry, and the only term I can't find is alternate exterior angles. I know what an alternate interior angle is, but not an exterior one. I am completly clueless! Please help, A.S.A.P.! Thanks------ S.B. Date: 06/03/2002 at 17:08:38 From: Doctor Peterson Subject: Re: Geometry definitions Hi, S.B. Here's a clue, from everyday English usage: "interior" means "inside", and "exterior" means "outside". (You may see those words on paint can labels, for example.) So alternate _interior_ angles are on opposite sides of the transversal, _between_ the parallel lines, like the pair of x's and the pair of y's here: \ ---+------- x \y \ y\ x -------+--- \ Alternate _exterior_ angles are also on opposite sides of the transversal, but _outside_ the parallel lines: x\ y ---+------- \ \ \ -------+--- y \x I suspect a lot of students hear these phrases as a whole, and never stop to think what the individual parts (alternate, interior, exterior) mean -- because they expect math terms to be incomprehensible and unrelated to real life! Sometimes math makes more sense than you realize at first. Maybe I can also help you not have to look for hours next time. To find what a word means, I would first go to a regular English dictionary; then maybe try one of the dictionary or encyclopedia resources listed in our FAQ, or search our site; then go to google.com and enter the phrase "alternate exterior angles" to see if there is a definition on the web. You'll find it! - Doctor Peterson, The Math Forum http://mathforum.org/dr.math/ |
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