Angle W is 125 degrees since the two have to add up to 360, since they form a whole, round angle. Angle Y is 138 degrees, since the two angles there form a straight line, making a total of 180, then subtracting 42 to find y. Angle X is 50 degrees, since in the diagram, it shows that the two angles form a right angle, giving it a total of 90 degrees. Then all you have to do is subtract 40. Now, for Angle Z, you have to add up all the angles you know in shape B, which is 125+138+40=303. Now, since all quadrilaterals interior angles add up to 360 degrees, you do 360-303=57. So, Angle Z =57
