Steps of Construction
1. Construct a line segment PQ=6 cm.
2. At the point P construct rays which make an angle of 450 and at point Q which makes an angle 60∘ which intersects each other at point R.
3. Construct the bisectors of ∠P and ∠Q which intersect each other at point I.
4. From the point I construct IL which is perpendicular to PQ.
5. Taking I as Centre and IL as radius construct a circle which touches the sides of ΔPQR internally.
This is the required incircle where the point I is incentre.