All constructions
Arc with centre
Draws an arc round a centre, counter-clockwise from a start point to a ray. Ruler and compass only.
All parts
Part 1 of 3: Put the compass on OStep 1 of 1Compass
The arc has centre O. Put the point of your compass on O.
Keys: left and right arrows step, Space plays or pauses, Escape goes back to all constructions.