# Mark the correct

Here, angles of triangle are in A.P.

So, Let angles of triangle are a,a+d,a+2d.

We know that, sum of angles of triangle is π.

a+a+d+a+2d=π

3a+3d=π

3(a + d) =π

Also, by our assumption, a + d is one angle of triangle.

So, required measure of one of the angles is .

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