[size=85][b]Step 1:[/b] Use the CIRCLE TOOL [icon]/images/ggb/toolbar/mode_circle2.png[/icon] to construct a circle with center A and a radius that is more than half the length of segment AB.[br][b]Step 2:[/b] Use the COMPASS TOOL [icon]/images/ggb/toolbar/mode_compasses.png[/icon] to duplicate circle A and place this circle at center B.[br][b]Step 3:[/b] Use the INTERSECTION TOOL [icon]/images/ggb/toolbar/mode_intersect.png[/icon] to create points at both intersection points of the circles.[br][b]Step 4:[/b] Use the LINE TOOL [icon]/images/ggb/toolbar/mode_join.png[/icon] to construct a line through both intersection points.[br][b]Step 5:[/b] Use the INTERSECTION TOOL [icon]/images/ggb/toolbar/mode_intersect.png[/icon] to create a point at the intersection of segment AB and the line you constructed in Step 4.[br][br][i]The line you created in Step 4 is the [b]perpendicular bisector[/b] of segment AB.[br]The point you marked in Step 5 is the[b] midpoint[/b] of segment AB.[br][br][/i]After you complete the example, work on the practice. These will not let you know if you've done them correctly. I will be checking on my computer.[br][/size]