Using rulers and compasses only, construct a △ABC,

Steps of Construction:

1. Construct a line segment BC of 7cm

2. At the point B, draw ∠XBC = 60°.

3. Keeping B as center and radius 12 cm draw an arc which intersects XB at D

4. Join DC

5. Draw the perpendicular bisector of DC which intersects DB at A

6. Join AC

Hence △ABC is the required triangle.