Question

I will give a medal to him/ her whoever help me solve this problems. This question is true or false in order to find the circumference of a circle, you must always know the diameter.

Answer 1

Anyone???

Answer 2

False

Answer 3

Do u agree meg-72 with rosediva answer

Answer 4

sorry I was not by my computer... did you get the answer?

Answer 5

The diameter of a circle is the length of the line through the center and touching two points on its edge. In the figure above, drag the orange dots around and see that the diameter never changes.

Sometimes the word 'diameter' is used to refer to the line itself. In that sense you may see "draw a diameter of the circle". In the more recent sense, it is the length of the line, and so is referred to as "the diameter of the circle is 3.4 centimeters"

The diameter is also a chord. A chord is a line that joins any two points on a circle. A diameter is a chord that runs through the center point of the circle. It is the longest possible chord of any circle.

If you know the radius
Given the radius of a circle, the diameter can be calculated using the formula
where:
R is the radius of the circle



If you know the circumference
If you know the circumference of a circle, the diameter can be found using the formula
where:
C is the circumference of the circle
π is Pi, approximately 3.142



If you know the area
If you know the area of a circle, the diameter can be found using the formula
where:
A is the area of the circle
π is Pi, approximately 3.142