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Mathematics 16 Online
OpenStudy (squidnnneyyy):

In triangle XYZ, XY=15, YZ=21, and XZ=27. What is the measure of angle Z to the nearest degree? (Do not give answer, I just want help)

OpenStudy (lolyeha):

Try the cosin equation. c²=a²+b²-2ab cos(<°acb)

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