Where the angle bisectors intersect determines the center of the incircle.
Where the side perpendicular bisectors intersect determines the center of the center of the circumcircle. From these definitions, you should be able to determine the points you want.
Answer:
the length is 8 and the width is 6.5
Step-by-step explanation:
6.5 x 2 = 13 - 5 = 8 x 6 = 52
The Calculator can confirm.
Answer:
(a) 4.152698
(b) 3.215557
Step-by-step explanation:
(a)

n=4, so :
Each subinterval has length :

Therefore the subintervals consist of:
![[1,5], [5,9], [9,13]](https://tex.z-dn.net/?f=%5B1%2C5%5D%2C%20%5B5%2C9%5D%2C%20%5B9%2C13%5D)
Now, the midpoints of these subintervals are:

Hence:

(b)

n=4, so :
Each subinterval has length :

Therefore the subintervals consist of:
[1,5], [5,9], [9,13]
The endpoints of the subintervals consist of:
5,9
Hence:
