Area = 1/4*Pi*d2
1/4*3.14*42 = about 12.56cm2
Circumference = Pi X Diameter = 3.1415 X 4cm = 12.566cm
4cm
The formula for the circumference of a circle is C = πd, π = 3.142, d = 4cm C = 3.142 x 4cm C = 12.568cm
Circumference of a circle = 2*pi*radius or diameter*pi
5
radius=4cm diameter=8cm *radius is half the diameter
Circumference = Pi X Diameter = 3.1415 X 4cm = 12.566cm
you half the diamater to get the radius, then you square the radius. Then you times it by 3.14. Always. example. Diameter=4cm then radius =2cm squared=4cm 4x3.14=12.56
4cm
Method to find area of a circle is: The area of a circle is its radius squared times pi. Assuming the pipe has a diameter of 4cm: radius = 2 cm Circumference = 12.5664 cm Area = 12.5664 cm2
The radius is double the diameter so 4cm.
Diameter of circle = 2 * Radius of the circle.
The formula for the circumference of a circle is C = πd, π = 3.142, d = 4cm C = 3.142 x 4cm C = 12.568cm
Circumference of a circle = 2*pi*radius or diameter*pi
A circle with a radius of 4 cm has an area of 50.27 square cm.
5
The radius is half the diameter. So multiply the radius by 2.