Patrick B. answered • 12/15/18
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c^2 = a^2 + b^2 - 2ab cos c
17.2^2 = 26^2 + 19^2 - 2 (26)(19) cos c
-0.75016 = cos c
c = 138.6
Zachary G.
asked • 12/14/18In △ABC, a=26, b=19, and c=17.2. Identify m∠C rounded to the nearest degree.
Identifying angles of a triangle
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