Perimeter is another word for 'Circumference'.
The equation to find the circumference is
C = 2pir
or
C = pi*d
Where d = 2r
&
r = radius
d = diameter
pi = 3.141592..... ~ 3.14
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length plus width equals perimetre
^Perimetre. Outer length of a shape.
Perimetre of squre is 4*(side) and side is 8 cm so perimetre is 4*8=32cm
4 times the length of its side.
Known as the Circumference