4. b
5. d
Interior Angle Sum Thereom S = 180(n - 2) S being sum of the measures of its interior angles , n is for sides
360 degrees looking at the shape ABDC as a whole.. 180 looking at it as CAD
90+26= 116
180-116
64
Angles
C = 90degrees
A= 26 degrees
D= 64degrees