A rectangular garden is to be drawn on a coordinate grid. Two opposite vertices of the rectangle are A(2,1) and C(8,6). The sides of the rectangle are parallel to the coordinate axes.
(i) Plot the points A and C on graph paper.
(ii) Determine the coordinates of the remaining two vertices B and D so that the vertices appear in the order A,B,C,D while moving clockwise.
(iii) Plot the points B and D and complete the figure of the rectangle, labelling all vertices.
(iv) Verify that ABCD is a rectangle by comparing the lengths of its sides, using only the differences in the respective coordinates.