The radius of a circle is half the diameter.
When advertised the measure of a pizza is its diameter. A 24 inch pizza therefore should have a diameter of 24 inches.
with a big tape measure
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
The radius is half the diameter. Draw a line that passes through the centre of the circle and measure it. This is the diameter. Halve it and you will have the radius.
You measure it with the tape ruler thing or use pi (3.1415937) times the radius or the diameter. I forgot which one.
The radius of a circle is half the diameter.
24 inches, because the radius is always 1/2 of the diameter.
The area of a pizza depends on the size of said pizza. If there is a certain pizza you would like to find the area of, all you need to do is: 1. measure the diameter of the pizza 2. split the diameter in half to get the radius 3. square the radius and multiply it by pi(3.14). For example, if I have a pizza with a diameter of 10 inches I would split that in half to get a radius of 5 inches. Then I would do this: (3.14) x 52. Which would end up being 78.5 in2. Tada, now you know how to get the formula of a pizza!
When advertised the measure of a pizza is its diameter. A 24 inch pizza therefore should have a diameter of 24 inches.
14 inches radius = 1/2 the diameter diameter = 2 x radius
If you have a physical cylinder to measure, measure the "width" of the circle that is the cross section of the cylinder. That is the diameter, Half the diameter is the radius.
with a big tape measure
24 meters diameter is simply twice the radius.
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
24 meters diameter is simply two times the radius.
The radius of a circle is 1/2 of its diameter