If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter.
What is the circumference of 9mm?
A circle of radius = 1.432 or diameter = 2.865 or circumference = 9 mm has an area of: 6.446 × 10-12 square kilometers (km²)
What is the diameter of a 24cm circle?
Circles (basic)
| Diameter | Circumference(approx) | Circumference |
|---|---|---|
| 8 cm | 24 cm | 25.12cm |
| 20 cm | 60 cm | 62.8cm |
| 40 cm | 120 cm | 125.6cm |
| 3m | 9m | 9.42m |
How to calculate the diameter of a circle?
The formula used to calculate circle diameter is: ø = 2 · r. Symbols. ø = Circle diameter; r = Circle radius; Radius of Circle. Enter the radius of a circle. The radius is the distance between the centre and any point on the outer edge of a circle. Diameter of Circle. This is the diameter of a circle that corresponds to the specified radius.
Is the radius of a circle the same as the circumference?
Radius of a circle is the distance between center of circle and the point on circle. Radius is half of diameter, the longest chord of circle. Circumference is the distance around the circle.
What are the three dimensions of a circle?
There are three dimensions most often used to describe a circle: 1 The diameter – defined above 2 The radius – the distance from the circle’s center or origin to the edge, one half the diameter 3 The circumference – the length of the outside boundaries of the circle More …
Which is true about the chord of a circle?
Let us discuss a few important theorems and their proofs related to the chord of a circle. Theorem 1: The perpendicular line drawn from the center of a circle to a chord bisects the chord. The converse of the above theorem is also true. Theorem 2: The line drawn through the centre of the circle to bisect a chord is perpendicular to the chord.
