IN MATH: 1. n. distance around a figure; sum of the lengths of the sides. EX. The word perimeter comes from "peri meter" meaning "around measure."

Rectangle
The perimeter, P(L, W) = 2(L) + 2(W), or the
area, A(L, W) = (L)(W), of a rectangle.
 
Width:  
Lenght:   
 
    is

Square
Since all sides of a square are the same length,
the length equals the width, L = W.
    The perimeter is four times the lenght:
P(L, W) = 2(L) + 2(W) = 2(L) + 2(L) = 4(L)
    The area is the length squared:
A(L, W) = (L)(W) = (L)(L) = L²
The perimeter, P(L) = 4(L) or the
    area, A(L) = L², of a square rectangle.
 
Lenght:   
 
    is

Circle
Circles are describe in terms of their radius or diameter.
The circumference is the perimeter of a circle.
The circumference,
    in terms of radius, or
    in terms of diameter,
The area,
    in terms of radius, or
    in terms of diameter,
 
Using a radius of:  
    The ( or ) is:
    square units or units.
Using a diameter of:  
    The ( or ) is:
    square units or units.

IN ENGLISH: 1. n. the region encircling a place or region. EX. Guard the perimeter of the camp against attack. 2. as defined above.

APPLICATION: See list 140.

Determine the perimeter of each regular polygon with sides of 13 ft.
1. triangle2. quadrilateral3. hexagon 4. octagon
5. decagon6. pentagon7. septagon

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