Contenu connexe Similaire à Constructions1 Similaire à Constructions1 (20) Constructions11. Perpendicular bisector of a line. Perpendicular Bisector Join up the points where your circles cross. Draw the same size circle with centre B Draw a circle with centre A. A B 3. Perpendicular from a point to a line. Draw circles with centres on the two arcs. Perpendicular line 9. From the starting point draw a circle of any radius. From this point draw a circle (arc) of the same radius 11. 90 degree angle. Start with the 60 0 angle (but don’t join it up) From this point draw a circle (arc) of the same radius 12. 90 degree angle. From these arcs draw two more intersecting circles Join up the intersections You now have a right angle!