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Radius is the distance from the center point to the edge of the circle. Diameter is the distance straight through the center point and across the circle. Circumference is the distance one full turn around the circle.
Radius = 1/2 of the diameter
Radius = (circumference) divided by (2 pi)
Diameter = 2 times the radius
Diameter = (circumference) divided by (pi)
Circumference = (pi) times the diameter
Circumference = (2 pi) times the radius
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How can you be sure if there is a relationship between diameter and the circumference?
You can do an experiment on several circles of different diameters.
Calculate the circumference of a circle with each diameter?
Multiply each of the diameters by pi (pi = 3.14159265 or 3.14 for rough approximation) to find the circumferences of the circles.
What are the special properties of circles?
They have a circumference which is 2*pi*radius or diameter*pi They have an area which is pi*radius2 They have sectors They have chords They have segments They have a total of 360 degrees around their circumferences They have arcs which is part of their circumferences They can have a tangent which is a straight line that touches it at one point
What is the relationship between the radius of a circle and the circumference?
any circles circumference divided by its diameter will equal pi, or 3.14159 approximately
What is the ratio between a circles diameter and its radius?
It is: 2 to 1
What is the relationship between two circles?
Their circumferences are in direct proportion to their radii. Their areas are in direct proportion to the square of their radii.
Why was the formula for finding the circumference of a circle invented?
Because it was found that there was a direct relationship between the radii (or diameters) of circles and their circumferences.
How can you be sure if there is a relationship between diameter and the circumference?
You can do an experiment on several circles of different diameters.
Which lines are complete circles?
They are circumferences
Calculate the circumference of a circle with each diameter?
Multiply each of the diameters by pi (pi = 3.14159265 or 3.14 for rough approximation) to find the circumferences of the circles.
If there are two circles and the small one has diameter of 20 what is the radius of the big circle?
You need some more information about any of the circles, or about the relationship between the two circles, to answer this question.
What are the special properties of circles?
They have a circumference which is 2*pi*radius or diameter*pi They have an area which is pi*radius2 They have sectors They have chords They have segments They have a total of 360 degrees around their circumferences They have arcs which is part of their circumferences They can have a tangent which is a straight line that touches it at one point
What is the relationship between the radius of a circle and the circumference?
any circles circumference divided by its diameter will equal pi, or 3.14159 approximately
What is the retationship between the circumference and the diameter?
What is the relationship between the circumference and the diameter? Answer The circumference divided by pi gives the diameter. d = C / pi An alternate way to express the above answer. For all circles, pi is the ratio of the circumference to the diameter pi = C / d
What is the ratio between a circles diameter and its radius?
It is: 2 to 1
What are two ways a circle and a cylinder the same?
The bases of a cylinder are circles and both have circumferences Area of the base of cylinder and a circle is pi*radius2 Circumference of a cylinder and a circle is 2*pi*radius or diameter*pi
Is it true that circles with a radius of Cm have circumferences of the same length?
Yes, it is true. Any circles with the same radius will have the same circumference as well.
