The circumference of a circle if the diameter is 12cm is 37.7cm
12 cm A diameter is twice as long as the radius of a circle. D = 2r D = 2(6cm) = 12cm
The area is 113.1 square cm.
Circumference of a circle = Pi x D c = 3.14159 X 12 c = 37.7 cm _______________________________ Area of a circle = (Pi) r2 A = 3.14159 X (6)2 A = 3.14159 X 36 A = 113.1 cm2
The radius of a circle is the distance from the centre to the edge. The diameter is the distance right across the circle through the centre. So the diameter of a circle is always twice its radius. So if the radius of a circular CD is 6cm, the diameter is twice this - 12cm.
Using 3.14 as Pi the area of circle is: 113.03999999999999
The circumference of a circle if the diameter is 12cm is 37.7cm
12pi cm
12 cm A diameter is twice as long as the radius of a circle. D = 2r D = 2(6cm) = 12cm
the diameter of a circle is double the radius so if the radius is 12 cm then the diameter is 24 cm
using the formula circumference=diameter X pi: circumference=diameter X pi circumference/pi=diamter X pi/pi circumference/pi=diameter therefore, diameter=circumference/pi diameter=12mm/3.14 diameter=3.821mm
The diameter of circle A is 12cm so its radius must be 6cm.
perimeter of a circle = circumference = pi x diameter perimeter = 3.1416 x 12 = 37.7 cm
The area is ~452.3 cm2
circumference = π x diameter ⇒ diameter = circumference ÷ π = 12 cm ÷ π ~= 3.8 cm
The area is 113.1 square cm.
Circumference = pi x diameter. So the circumference of a circle with diameter 12 cm = pi x 12 = 37.7 cm (1 decimal place.)