Question

Construct an equilateral triangle of side $6cm$ and mark the incircle.

Answer 1

Draw a line $AB=6cm$

At $A$ & $B$ make an angle of 60°.

Now, cutting point of angle of $A$ & $B$ at $C$. Make angle bisector of $\angle A,\angle B$ & $\angle C$.

Cutting point of angle bisector of $A,B$ & $C$ are incentre. with centre I make circle with touching sides of triangle $ABC$.