What are the properties of the incenter of a triangle

Step-by-step explanation:

Properties of incenter of a triangle:

1) The point of concurrency of the angel bisectors is known as incenter.

2) Incenter of the triangle is the center of the incircle of the triangle.

3) Incenter is always located inside the triangle.

4) Incenter is equidistant from every side of a triangle.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

a is the best answer choice