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Mathematics 10 Online
OpenStudy (theduck):

what is the value of a?

OpenStudy (theduck):

plz help me

OpenStudy (mathmale):

Important principle that applies here: the sum of all three interior angles of a triangle is always 180 degrees. You are given the measures of two of these angles; use this sum fact to calculate the third angle.

OpenStudy (theduck):

ummm.... what

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