STEP 1 - CIRCLE AND DIAMETER: Draw a circle and a vertical line through its centre. ... STEP 2 - BISECT DIAMETER: Set your compass to the diameter of the circle.

When you need to draw large circles and rounded corners, you can build your own compass on the cheap.

STEP 2: Place the compass at the point where the two arcs meet and draw a circle. Place the compass at either end of the horizontal line and extend the arcs so that they cross the circle.