Consider the following parallelograms. Find the values of the unknowns x, y, z

(i)x+100=180[Adjacent angles]x=80z=x=80[opposite angles are equal]y=100(ii)50+y=180y=130 x=y=130 and z=x=130 (corresponding angles)(iii)x=90 (vertically opposite angles)x+y+30=180 y=180-120=60 z=y=60 (Alternate angles)(iv)z=80,y=80(Opposite angles)x+y=180 ,x=180-80 =>x=100 (v)y=112 (opposite angles)x+y+40=180 (Angle sum property)x=180-152x=28 z=x=28 (Alternate angles)