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In triangle ABC, the angles A, B, C form an arithmetic sequence. if A = 17 degrees, then what is angle C, in degrees?

 Apr 30, 2022
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A   +  B +  C  = 180

 

17  +  (17 + d)  + (17 + 2d)  = 180

 

51   +  3d  =  180

 

3d =  180  - 51

 

3d =  129

 

d = 129 / 3  =  43

 

C =  17 + 2(43)  =   103°

 

 

cool cool cool

 Apr 30, 2022

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