I have a problem I don't get it. In quadrilaterel abcd is inscribed in a circle. angle a and d is unknown. but angle b is 198 degress and angle c is 204 degress. how would i found the degrees of quarrilaterel abcd. please help me detail. thanks.
The sum of the FOUR interior angles of a quadrilateral = 360 degrees. You have TWO angles that total 402 degrees.....are you sure your numbers are correct? Do you have the diagram???