Tangents from a point

Draws both tangents from a point outside a circle. Ruler and compass only.

All parts

Part 1 of 4: Midpoint of POStep 1 of 11Compass

The touch points lie on the circle with PO as diameter. Start with its centre. Put the point of your compass on P.

Keys: left and right arrows step, Space plays or pauses, Escape goes back to all constructions.