Draw any obtuse triangle and construct the bisector of each of its angles.
Remember that
An obtuse triangle is a triangle that has an interior angle measure greater than 90 degrees
Example
we have the triangle 120-30-30 degrees
Remember that
An angle bisector is a line or ray that divides an angle into two congruent angles
that means
the angle of 120 degrees------> is divided into two congruent angles of 60 degrees each
the angle of 30 degrees ----> is divided into two congruent angles of 15 degrees each
The point of intersection of angle bisectors of the 3 angles of a triangle is the incenter