Save guides, add subjects and pick up where you left off with your BBC account. Find the equation of a circle with radius 3 units and centre (0, 0). The radius, \(r = 3\) and \(r^2 = 9\), so the ...

Despite the differing shapes, these two graphs are isomorphic. Each circle on one graph corresponds to a circle on the second graph and connects to the same other circles. Corresponding nodes are ...