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# Constructions1

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### Constructions1

1. 1. 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
2. 2. Perpendicular from a point to a line. Draw an arc with the point as the centre.
3. 3. Perpendicular from a point to a line. Draw circles with centres on the two arcs. Perpendicular line
4. 4. Perpendicular from a point on a line. Draw arcs from the point that cut the line.
5. 5. Perpendicular from a point on a line. Draw circles with centres on the two arcs.
6. 6. Angle Bisector. Draw arcs from the angle to cut the lines
7. 7. Angle Bisector. Draw circles with centres on the two arcs.
8. 8. Angle Bisector. Has the line bisected the angle?
9. 9. From the starting point draw a circle of any radius. From this point draw a circle (arc) of the same radius
10. 10. Join the intersection to your starting point. Measure your angle
11. 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. 12. 90 degree angle. From these arcs draw two more intersecting circles Join up the intersections You now have a right angle!