You can put this solution on YOUR website! a = 4
b = 7
c = 9
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use law of cosines to find angle A:
cos A = (bb + cc - aa) / 2bc
cos A = (7*7 + 9*9 - 4*4) / (2*7*9)
cos A = 0.904761904762
A = acos( 0.904761904762 )
A = 25.2087652967 degrees
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use law of cosines to find angle B:
cos B = (cc + aa - bb) / 2ca
cos B = (9*9 + 4*4 - 7*7) / (2*9*4)
cos B = 38.1971863421 degrees
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C = 180 - A - B
C = 180 - 25.2087652967 - 38.1971863421
C = 116.594048361 degrees
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answer:
there's nothing special about this triangle
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