Discussion

Explanation:

Since ∆ABC circumscribes the circle, it means the circle is the incircle of ∆ABC.

We know that area of a triangle = r × s

where, r is the inradius and s is the semiperimeter of the triangle.

s = (13 + 14 + 15)/2 = 21

⇒ Area = 4 × 21 = 84

Hence, option (a).

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