Answer:
B, A and C
Explanation:
4: It’s useful to know that the exterior angle of a triangle is equal to the sum of the two other interior angles so WXY = 62 + 73 = 135 degrees. Of course if you didn’t know this you can just calculate YXZ first but this is a little bit quicker.
5: x is equal to the exterior angle of the octagon. Since the sum of exterior angles in any polygon is always 360, then x = 360/8 = 45 degrees.
6: The interior angle of a regular hexagon is 180(6-2)/6 = 120 degrees. In the right angled triangle in the top right of the rectangle, the angle to the left of x is equal to 180 - 120 = 60, so x = 180 - 90 - 60 = 30 degrees.