To construct a trapezium ABCD with AB∥CD, AB = 8 cm, BC = 5 cm, AD = 6 cm and ∠ABC=60∘, we follow the following steps:
1) Draw the line segment AB = 8 cm.
2) Construct the angle ∠ABX=60∘ at B.
3) With B as centre, draw an arc of radius 5 cm cutting BX at C.
The next step is ___.