An angle of 15 degree is drawn using a pair of compass and ruler by bisecting    (a) 60 degree        (b)60 degree and 120 degree    (c) 60 degree and then bisecting it again       (d) 60 degree and 180 degree

an angle of 15 degrees can be drawn by -:
1) first draw an angle of 60 degrees using a pair of compasses and ruler.
2) bisect it.  this will make an angle of 30 degrees.
3) bisect it again and thus we get an angle of 30 degrees.