Steps of construction:
Draw a rough diagram for triangle ABC.
(i) To draw the Altitude from vertex B,
1. Extend the line from the points A,C respectively.
2. Draw the arc from the centre B, such that, arc cuts the line AC at P and Q respectively.
3. With P and Q as centres and more than half the distance between these as radius draw two arcs to intersect each other at R.
4. Join BR, which intersects AC at the point D.
Clearly, BD⊥AC,
Hence, altitude BD is formed.
(ii) To draw the Median from vertex B.
1. Draw the arcs on both sides of the side AC with the radius is more than 12AC from the centres A,C. these arcs are intersected at S,T respectively.
2. Join ST, which intersect AC at the point E, such that AE=CE.
i.e, E is the mid-point of the side AC.
3. Join BE.
Hence, median BE is formed.