Suppose z1, z2, and z1z2 are complex numbers in the first quadrant and that the points z =...

Suppose z1, z2, and z1z2 are complex numbers in the first quadrant and that the points z = 0, z = 1, z1, z2, and z1z2 are labeled O, A, B, C, and D, respectively. Study the formula in (1) and then discuss how the triangles OAB and OCD are related.

 (1)