1. Draw line segment AB.[br]2. Put the compass point on A so that the compass measures longer than over halfway to B and draw a long arc above and below segment AB.[br]3. Using the same compass measurement as step 2, place the compass on point B and draw a long arc above and below so that it intersects the arc from step 2 at C and D.[br]4. Draw line CD.[br]5. The intersection of line segment AB and line CD is point M.[br]6. M is the midpoint of segment AB. Line CD is the perpendicular bisector of segment AB. [math]\angle[/math]AMC is a right angle.