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**Angle bisector**:

A line, line segment or ray that divides the angle into two equal angles is the angle bisector.

**Incentre**:

The point of concurrence of the three angle bisectors of the triangle is the incentre of the triangle.

**Why**

**is it called the incentre**?

With the incentre as the centre, we can construct a circle such that the circle touches all three sides of the triangle internally.

Consider the figure given below for a better understanding.