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Mathematics 18 Online
OpenStudy (anonymous):

What's so special about angles that add up to 160 degrees?

OpenStudy (mrnood):

did you mean 180 deg?

OpenStudy (zzr0ck3r):

Every angle is special!

Directrix (directrix):

>>What's so special about angles that add up to** 180** degrees? Read the name for a pair of such angles here: http://www.mathwords.com/s/supplementary_angles.htm

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