Comments on: When do you use angle addition postulate and when do you use definition of supplementary angles in geometry? http://www.mathstudenthelp.info/addition/when-do-you-use-angle-addition-postulate-and-when-do-you-use-definition-of-supplementary-angles-in-geometry Let us help you add it up! Mon, 21 May 2012 09:58:32 +0000 http://wordpress.org/?v=2.7 hourly 1 By: cubs_woo_cubs_woo http://www.mathstudenthelp.info/addition/when-do-you-use-angle-addition-postulate-and-when-do-you-use-definition-of-supplementary-angles-in-geometry/comment-page-1#comment-6541 cubs_woo_cubs_woo Sun, 13 Sep 2009 07:00:59 +0000 http://www.mathstudenthelp.info/addition/when-do-you-use-angle-addition-postulate-and-when-do-you-use-definition-of-supplementary-angles-in-geometry#comment-6541 This is not the angle addition postulate. The angle addition postulate states that if you have two adjacent angles, you can rename the two small angles as one bigger angle. If the angles are ABC and CBD, where they share ray BC, you can rename these two angles as the large angle ABD. Angle addition postulate would be your reason for saying that ABC + CBD = ABD. The property your looking for where showing that angle 1 + angle 2 = 180 degrees would either be the definition of a linear pair. Usually we only use definition of supplementary if you have "angle 1 and angle 2 are supplements" as given information. All you showed me as a given is the drawing, which means you can assume a linear pair.<br><b>References : </b><br>I'm a high school geometry teacher This is not the angle addition postulate. The angle addition postulate states that if you have two adjacent angles, you can rename the two small angles as one bigger angle. If the angles are ABC and CBD, where they share ray BC, you can rename these two angles as the large angle ABD. Angle addition postulate would be your reason for saying that ABC + CBD = ABD.

The property your looking for where showing that angle 1 + angle 2 = 180 degrees would either be the definition of a linear pair. Usually we only use definition of supplementary if you have "angle 1 and angle 2 are supplements" as given information. All you showed me as a given is the drawing, which means you can assume a linear pair.
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I’m a high school geometry teacher

]]> By: care http://www.mathstudenthelp.info/addition/when-do-you-use-angle-addition-postulate-and-when-do-you-use-definition-of-supplementary-angles-in-geometry/comment-page-1#comment-6540 care Sun, 13 Sep 2009 06:19:59 +0000 http://www.mathstudenthelp.info/addition/when-do-you-use-angle-addition-postulate-and-when-do-you-use-definition-of-supplementary-angles-in-geometry#comment-6540 you can use either supplementary or angle addition post. in this example. angle add. can be used for any size angles & any amount of angles but supplementary is only if it equals 180. in this you can use either<br><b>References : </b><br> you can use either supplementary or angle addition post. in this example. angle add. can be used for any size angles & any amount of angles but supplementary is only if it equals 180. in this you can use either
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