<PRE><B>Question 710918</B>
Given a triangle with sides measuring 18 inches, 21 inches, and 14 inches find the measure of the angle with the greatest measure.
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Use the Law of Cosines.
Largest angle is the angle opposite the largest side.
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cos(A) = [18^2+14^2 - 21^2]/[2*18*14] = 0.1567
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A = cos^-1(0.1567) = 80.98 degrees)
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Cheers,
Stan H.</PRE>