The diagram is a net right rectangular pyramid. Calculate the total surface area

The diagram shows a rectangular cardboard from which a semi-circle is cut off. Calculate the area of the remaining part

In the diagram, 0 is the centre of the circle. Find the value x

In the diagram, < WOX = 60^o, < YOE = 50^o and < OXY = 30^o. What is the bearing of x from y?

A = {2, 4, 6, 8}, B = {2, 3, 7, 9} and C = {x : 3 < x < 9} are subsets of the universal set U = {2, 3, 4, 5, 6, 7, 8, 9}. Find 

(a) \(A \cap (B' \cap C')\) ;

(b) \((A \cup B) \cap (B \cup C)\).