Question 4
(4) Figure 3 shows the elevation of a container with an open top.
Extending the base ab at both ends
Using radius af and bg at centres a and b to draw an arc to intercept the horizontal base line at J and K respectively
Dropping perpendiculars from points J and K to intercept extended base lines at point f1 and e1 and g1 and h1 respectively
Joining the points A to f1, A to f2, B to g2, B to g, C to h1, C to h2, D to e2, and D to e1 to produce the sides of the container
Joining the points e1 to f1, f2 to g2, g1 to h1 and h2 to e2 to complete the pattern of the container