+121 
Quadrilateral ABCD is inscribed in this circle.
What is the measure of ∠A ?
+37146 OPPOSITE angles of a cyclic quadrilateral ( a quadrilateral with all vertices on the circumference of a given circle) add to 180 degrees so A = 180 - 43 = 137 degrees
+37146 OPPOSITE angles of a cyclic quadrilateral ( a quadrilateral with all vertices on the circumference of a given circle) add to 180 degrees so A = 180 - 43 = 137 degrees
