In quadrilateral PQRS, angle Q = 80 degrees.
Angle R - angle S = 50 degrees.
angle P - angle R - angle S = 20 degrees.
Find the measures of angles P, R and S
ASSUME THAT angles P, R and S ARE a, b and c
YOU WILL GET THE ANSWER AS a, b and c
PROVIDE THE ANSWER AS a + b + c