Circle Touching 3 Points

How to construct a Circle touching 3 Points
using just a compass and a straightedge

Steps:

• Join up the points to form two lines
• Construct the perpendicular bisector of one line
• Construct the perpendicular bisector of the other line
• Where they cross is the center of the circle
• Place compass on the center point, adjust its length to reach any point, and draw your circle!

Note: this is the same method as Circumscribe a Circle on a Triangle