Perimeter Formula's
Perimeter of a square
P = 4a
You have to multiply the variable A, four times.
You have to multiply the variable A, four times.
Perimeter of a rectangle
P = 2b + 2h
You have to multiply the base (b) by 2, multiply the height (h) by 2 and then add both results.
You have to multiply the base (b) by 2, multiply the height (h) by 2 and then add both results.
Perimeter of a kite
P = A + A + B + B
OR
P = 2xA + 2xB
OR
P = 2xA + 2xB
Perimeter of a trapezium
P = A + B + C + D
Perimeter of a circle
C = Pi x D
OR
C = 2 x Pi x r
The perimeter of a circle is called the circumference.
D= Diameter
C= Circumference
R= Radius
OR
C = 2 x Pi x r
The perimeter of a circle is called the circumference.
D= Diameter
C= Circumference
R= Radius
Perimeter of a semicircle
P = Pi + D ÷ 2 + D
This has to be done in this order.
This has to be done in this order.