Quadrilateral ABCD is inscribed in circle O. What is m∠A ? Enter your answer in the box. ° A quadrilateral is inscribed in a circle O. The vertices of the quadrilateral lie on the edge of the circle and are labeled as A, B, C, and D. The interior angle A is labeled as x plus 5. The interior angle B is labeled as 2 x. The interior angle D is labeled as 3 x minus 5.