40*pi metres
diametre of circle
The diameter (not diametre) of a circle is a segment of a straight line going from the circumference (or perimeter), through the centre of the circle, to meet the circumference on the other side. A diameter of a sphere is defined analogously.
2.35
It is 25cm
92mm
Times the diametre by pi
If you had a circle and cut along the diametre you would get two half cirlces.
d = 11.46 inches
4 times pi. That is about 12.57.
The perimeter of a circle is its circumference
The circumference of a circle = pi*diametre = 2pi*radius
A diametre =2 aligned rayons it is a line from aside to a circle to another by passing from the center of the circle.