how to draw angles of 60 80 120 degrees and bisect them ?

draw a line l and mark a point on it
place the pointer of the compass  at o and draw an arc of convenient radius which cuts line l at a point, say A
with the pointer at A [ as centre] , draw an arc that passes through o and intersects at  the previous arc at point B.
join o and B
angle BOA will measure 60 degrees
 hope this helps you
  • 1
What are you looking for?