What is the formula for radius and diameter?

Related questions

1. What is the formula for a parabola?
2. What is the formula for pi?
3. How do you find radius from circumference?
4. What does the P stand for in the equation of a parabola?
5. How much is a diameter of a circle?
6. What is the formula for radius?
7. How do you find the equation of a quarter of a circle?
8. Why is Pi never ending?
9. What is the equation for half a circle?
10. How is the Pythagorean theorem related to the equation of a circle?

Tags

1. #circumference
2. #straight
3. #through
4. #radius
5. #distance
6. #center
7. #around
8. #outwards
9. #circle
10. #across
11. #diameter