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How to construct circum circle & incircle ?

To Draw a circum circle of a triangle

Step1: Draw perpendicular bisector of AB.
Step2: Draw perpendicular bisector of AC.
Step3: Mark the intersecting point as O.
Step4: Draw a circle with radius OA or OB or OC.

To draw incircle of a triangle

Step1: With the compass on a vertex, adjust its width to a medium setting.
Step2: Draw an arc across each leg.
Step3: Draw two intersecting arcs, one from each previous arc.
Step4: Draw an angle bisector line.
Step5: Repeat for one of the other vertices.
Step6: Mark the incenter as O where the two lines intersect.
Step7: Construct a perpendicular from the incenter to a side , creating point M.
Step8: With the compass on the incentre , set its width to point M.
Step9: Draw a circle with radius OM.


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