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In triangle ABC, the angles A, B, C form an arithmetic sequence.  If A = 14 degrees, then what is C, in degrees?

 Oct 20, 2021
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d = common ratio of the arithmetic sequence

 

a = 14

b = 14 + d

c = 14 + 2d        summed = 180

 

14     +    14+d    +   14+2d      = 180

42    +   3d  = 180

d = 46                                      then    c = 14 + 2d = 106o

 Oct 20, 2021

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