Given just three points, you can draw the perfect circle. This neat trick can be useful if you're not able to use a compass or trace around a suitable sized round object.
Edit Steps
- Start with three points. Draw three points on a piece of paper approximating the size of the circle you wish to draw.
- Using a straight edge, draw two line segments connecting two points per segment.
- Draw the perpendicular bisector of the segments you have drawn.
- The intersection of the perpendicular bisectors is the center of the circle.
- Draw a circle with the radius from the center of the circle to a point given.
- Erase the perpendicular bisectors and draw another line segment connecting the two points, forming a triangle. Or, simply erase all the lines and you have your circle.