How do you you rotate a figure 90 degrees clockwise about the origin?

Take any one point on the figure. Draw a line from it to the origin. At the origin measure an angle of 90 degrees (right angle) in a clockwise direction. Draw a line from the origin at this new angle and of the same length as the original angle. Repeat this process for the other points in the figure. NB Be careful, there will be numerous lines from the origin.

At the end points of the new lines, connect up to reveal the origin figure ,but rotated 90 degrees - clockwise.