If the radius of the inscribed circle is 1, then the circumference of the triangle is () A. 15B. 12C. 13D. 14

If the radius of the inscribed circle is 1, then the circumference of the triangle is () A. 15B. 12C. 13D. 14

Connecting OA, ob, OC, OC, OD, OD, OEO, of, O, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\it's not easy Choose B