The SURN Math Forum blog allows teachers to share and showcase what they are doing in their classrooms, offers a forum for questions, and lets viewers read posts of how teachers are working to effectively use mathematics strategies they learned at the workshop.
Wednesday, February 17, 2010
Angles
Last we focused on complementary, supplementary , vertical angles , etc. The students were having a hard time remembering the word "vertical". I told them that it is the one that is opposite of the angle you are looking for and it always forms a "V", either a wide "v" or a small "v". Also the kids came up with changing the "c" in complementary to a 9 and adding a 0 to remember that complementary is associated with 90 degrees. And for supplementary angles change the s to a 8 and add the 1 and 0 to associate supplementary with 180 degrees.
I have told my students that the "c" in complimentary is 90 degrees and if they put a backwards "c" underneath, but touching, a normal "c" they can create an "s". Two c's are the same as 90 + 90 so supplementary is 180 degrees.
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