Solution drawing: When using graphical representation we usually visualize the problem by making a drawing. We write down what is given and often also what we want to get.
The drawing we get in this way is called an illustrative drawing as it illustrates the solved problem. Sometimes we can see the solution of the problem immediately in this drawing. However,
in most cases we must manipulate with the drawing (e.g. we add suitable auxiliary elements) and we solve the problem with the help of this modified drawing.
We call this drawing the solution
drawing.