[b][size=100][size=150]Constructing a Square in Geogebra[/size][/size][/b][br][br] 1. Click on the point icon on the toolbar and click to create two points named A and B. {Be careful to not place points too far apart.}[br] 2. Join the two points by clicking on the line-segment icon in the line drop-down on the toolbar and clicking on A followed by B.[br] 3. Choose the perpendicular line icon on the toolbar. Click on the line segment AB and then on point B to draw a line perpendicular to AB at B.[br] 4. Create circle with a center at B and radius BA. Use the point tool to put a point at the intersection of the circle and the perpendicular line named C. [br] 5. Choose the perpendicular line icon on the toolbar. Click on the line segment BC and then on point C to draw a line perpendicular to BC at C.[br] 6. Create circle with a center at C and radius BC. Use the point tool to put a point at the intersection of the circle and the perpendicular line named D. [br] 7. Use the line segment tool and join point B to point C, then point C to point D and point D to point A.[br][br]