How many inches are in 21cm?
8.26 inch
Answer: 21 cm is equal to 8.26 inch Inch is bigger than a centimeter. One inch is equal to 2.54 cms. Using the calculator, we can thus calculate 21 cms divided by 2.54.
What is the area of a 21 cm circle?
Hence,the area of the circle is 346.5 cm².
What size shoe is 21 cm?
– Download a foot size chart (EU sizes) by clicking here
| Eu | UK | lengTH |
|---|---|---|
| 30 | 12 | 19 cm / 7.5″ |
| 31 | 12 1/2 | 19.6 cm / 7.7″ |
| 32 | 13 | 20.3 cm / 8″ |
| 33 | 1 | 21 cm / 8.3″ |
How do we find the radius of a circle?
Let us use these formulas to find the radius of a circle.
- When the diameter is known, the formula for the radius of a circle is: Radius = Diameter / 2.
- When the circumference is known, the formula for the radius is: Radius = Circumference / 2π
What is the average radius of a cookie?
If the radius of a circular cookie is 5 inches, then the circumference of the circle is equal to 10π inches, or approximately 31.4 inches.
What size is 21 in US?
| US Sizes | Euro Sizes | Inches |
|---|---|---|
| 5.5 | 21 | 5″ |
| 6 | 22 | 5.125″ |
| 6.5 | 22 | 5.25″ |
| 7 | 23 | 5.5″ |
What size is 21 in infant shoes?
Size Conversion Chart
| Estimated Age | Foot Length | EU |
|---|---|---|
| 6 – 9 months | 11.6 | 19 |
| 9 – 12 months | 12.3 | 20 |
| 12 – 18 months | 13 | 21 |
| 18 – 24 months | 13.7 | 22 |
How do you find diameter?
How To Calculate Diameter?
- Diameter = Circumference ÷ π (when the circumference is given)
- Diameter = 2 × Radius (when the radius is given)
- Diameter = 2√[Area/π] (when the area is given)