What is the radius if circumference is 20?
Table of Contents
What is the radius if circumference is 20?
r = 10/pi is approximately 3.18 feet.
What is the diameter of a 20 cm circumference circle?
Circles (basic)
| Diameter | Circumference(approx) | Circumference |
|---|---|---|
| 4 cm | 12 cm | 12.56cm |
| 8 cm | 24 cm | 25.12cm |
| 20 cm | 60 cm | 62.8cm |
| 40 cm | 120 cm | 125.6cm |
What does 20pi mean?
If you know the circumference (say 20pi), you can find the radius, because every circumference is just the radius times 2 times pi. We can work backwards and divide 20 pi by pi, to get 20, then divide that by 2 to get the radius of 10.
How wide is 20 cm?
Centimeters to inches conversion table
| Centimeters (cm) | Inches (“) (decimal) | Inches (“) (fraction) |
|---|---|---|
| 8 cm | 3.1496 in | 3 5/32 in |
| 9 cm | 3.5433 in | 3 35/64 in |
| 10 cm | 3.9370 in | 3 15/16 in |
| 20 cm | 7.8740 in | 7 7/8 in |
How do you measure the circumference of a circle?
To measure the circumference of a circle, first measure the diameter and multiply that number by the mathematical constant pi. The diameter is a straight line that goes from one side of the circle to the other and passes through the center, and the value of pi is always 3.141592. If using the radius, the formula for calculating the circumference is C = 2rpi, or Circumference = 2 times the radius times pi.
How do you find the diameter if you have the circumference?
How to find the circumference of a circle: The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. If a circle has a diameter of 4, its circumference is 3.14*4=12.56. If you know the radius, the diameter is twice as large.
How do you measure the diameter of a round object?
The diameter of a circle is the length of a straight line going from one side of a circle to the opposite side. To measure the diameter, simply choose two points on the edge of a circle that are directly across from each other, and measure the distance between these points.