This section is centred on finding the perimeter (the total distance around) of figures.
Rectangle
The perimeter of a rectangle, P = L + w + L + w
= 2(L + w)
Where, L is the length of the rectangle
And, w is the width of the rectangle.
Example
Square
The perimeter of a square, P = L + L + L + L
= 4L
Where, L is the length of a side of the square.
Example
Triangle
The perimeter of a triangle, P = the sum of all the sides.
Example
Circle
The perimeter of a circle is called its circumference. The circumference of a circle, C = 2πr or πd
Where, r is the radius of the circle
d is the diameter of the circle
And, π is 3.142 or 
.
Example
Perimeter, P = 2πr
