27. Of a wedge?

28. Of a pyramid?

29. Find the contents of the wedge, base 20 feet by 30 feet, height 10
feet, edge 15 feet.

30. State the prismoidal formula; would you use it in calculating
earthwork?

31. Is a simple question in calculating areas.--Ed. _Eng. News_.

32. How many and what parts of a plane triangle must be given to find
the rest?

33. Define the terms sine, co-sine, tangent, and co-tangent.

34. What are natural sines, co-sines, etc.?

35. What is a table of logarithmic sines, co-sines, etc.?

30. Two sides and two angles of a plane triangle being given, how do
you find the other parts?

37. When two sides of a plane triangle and their included angles are
given, how do you find the other parts?

38. In the right-angled triangle, A B H express algebraically the
value of the sine, co-sine, tangent, and co-tangent of angle A in
terms of a, b, and h, they being the altitude, base, and hypothenuse