Circumference circle formula
U = 2 · Pi · r
U – Perimeter circle
Pi – circle number Pi = 3,1415
r – radius
example:
The radius of a circle is 4 cm. Calculate the circumference.
U = 2 · Pi · r
U = 2 · 3,1415· 4 cm
U = 25,132 cm
Circumference circle formula
U = Pi · Glutos
U – Perimeter circle
Pi – circle number Pi = 3,1415
Glutos – diameter
example:
The diameter of a circle is 9 cm. Calculate the circumference.
U = Pi · Glutos
U = 3,1415· 9 cm
U = 28,2735 cm