David designs floor tiles. His latest design is shaped as a regular pentagon. Write a formula for the perimeter of the tile in terms of the length of a side. Evaluate the formula for the side length of 3 inches.
A.
P = 5s; 15 inches
B.
P = 5 + s; 8 inches
C.
P = 5 + s; 9 inches
D.
P = 5s; 18 inches

Question

David designs floor tiles. His latest design is shaped as a regular pentagon. Write a formula for the perimeter of the tile in terms of the length of a side. Evaluate the formula for the side length of 3 inches.
 A.	
  P = 5s; 15 inches  
 B.	
  P = 5 + s; 8 inches  
 C.	
  P = 5 + s; 9 inches  
 D.	
  P = 5s; 18 inches

anonymous · Answer

This is a regular pentagon which means that all angles/sides are equal. So, the pentagon look something like this:|dw:1365641269570:dw|This implies that each side will be of the same length. If each side is called s, then the perimeter is the sum of all the sides, hence Perimeter = 5s.

If we are given that s = 3, then we plug this in to our formula for perimeter P = 5s. What answer do you get after evaluating?

@Sonyalee77