Explanation:

Certainly! Let's break down the solution:

- The angles of a triangle are in an arithmetic progression (AP), so if we let the angles be $a-d$, $a$, and $a+d$, they must add up to 180°.

- Therefore, $(a-d)+a+(a+d)=180°$.

- Simplifying gives $3a=180°$, so $a=60°$. This is the middle angle.

- The smallest angle is 50° less than the largest angle, so $(a-d)=(a+d)-50$.

- Substituting $a=60$ gives $(60-d)=(60+d)-50$.

- Solving this equation: $60-d=10+d$, leads to $2d=50$, hence $d=25$.

- The largest angle is $a+d=60+25=85°$.

- Correct Answer: Option 2, 85°.

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