radius = diameter/2 radius = circumference/2*pi
The radius is a cord, is it not?
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
The length of the diameter is always twice the length of the radius.
If you know the radius and the angle (in radians) then r*x where r = radius, x = angle. If the angle is in degrees, then pi*r*x/180 Otherwise you have to measure it.
radius = diameter/2 radius = circumference/2*pi
The radius is a cord, is it not?
Pi times the radius of the circle squared = area And diameter is simply the radius x 2, since the radius is half the length of the circle.
The length of a radius is not the length of a diameter. The diameter is two times the length of the radius.
Assuming that radius would be the length from any vertex to the center of a figure, a regular hexagon. It can be divided into six congruent equilateral triangles.
pi*radius squared = 81 square units Divide both sides by pi and then square root both sides to find the value of the radius. radius = 5.077706252 or 5 units in length to one significant figure 2 times radius = diameter = 10 units in length
The length of a radius is half the length of a diameter.
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
To calculate the volume of a pipe, you can use the formula for the volume of a cylinder: Volume = πr^2h where r is the radius of the pipe and h is the height (length) of the pipe. Measure the radius and length of the pipe, plug them into the formula, and solve for the volume in cubic units.
The length of the diameter is always twice the length of the radius.
If you know the radius and the angle (in radians) then r*x where r = radius, x = angle. If the angle is in degrees, then pi*r*x/180 Otherwise you have to measure it.
Length of diameter:length of radius = 2:1