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In triangle ABC, the angles A, B, C form an arithmetic sequence. If \angle A = 60^\circ, then what is C, in degrees?

 Jan 7, 2025
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We can rewrite the angles as A=60, B=60+x, and C=60+2x. Now, we can use the Triangle Sum Theorem to solve for x. We can make the equation 60+60+x+60+2x=180 Solving for x gets x=0, so therefore all of the angles are 60 so C=60.
 Jan 7, 2025

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