1) Draw XY for 11 cm
at X draw 70/2 = 35 degrees to XY
at Y draw 60/2 = 30 degrees to YX
These two lines would meet at A
Draw perpendicular bisector to XA and when extended it would intersect XY at B
Draw perpendicular bisector to YA and when extended it would intersect XY at C
Now join AB and AC
we have triangle ABC
