All constructions
ABC
Try it on the Geometry BoardUses:Midpoint and perpendicular bisectorBisect an angle

Symmedian

Draws the median from a corner reflected in the angle bisector there. Ruler and compass only.

All parts
Part 1 of 5: Midpoint of the opposite sideStep 1 of 11Compass

Start with the median from A. Put the point of your compass on B.

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