Answer:
Following are the responses to the given question:
Perimeter of polygon:

Step-by-step explanation:
In this question we calculate the perimeter of a polygon which can be defined as follows:
Using formula:

When vertices are:



Answer:y=4 and the bottom is boundary point
Step-by-step explanation:
This may be wrong but i would put 48, 78 and 118
Answer: B has greater spread than A.
Step-by-step explanation:
Since we have given that
Set A: {38, 12, 23, 48, 55, 16, 18}
Range of A = Highest - Lowest
Range of A = 55 - 12
Range of A = 43
Set B:{44, 13, 24, 12, 56}
Range of B = Highest - Lowest
Range of B = 56 - 12
Range of B = 44
Since Range of B is more than range of A.
Hence, B has greater spread than A.