Sum of internal angles of a quadrilateral = 360smagish wrote:The answer is c
As shown in figure
(180 - w) + (180 - x) + (180 - y) + (180 - z) = 360
720 - w - x - y - z = 360
=> x+y = 360 - w -z
Hence we need both w & z to find the value of x+y
Hence C is correct

















