step 1:draw a ray and mark O point on it.
step 2:let us take protactor and measure 150degrees and mark it as B.
step 3: let us take o as centre and draw an arch and point it as A and C
step 4: now take C as centre and draw an arch . and draw a line it is the line of bisector of 2 parts. mark it as D.
step5:take the radious of lenght of OC bar and draw an arch from C and D and markit as E.
step 6:take the same radiuos and draw an arch from A and D and mark it as F.