# Formula for diameter of a circle

1. May 5, 2006

### Vast

How do you get the diameter of a circle from the area alone? Can this be done?

2. May 5, 2006

### Curious3141

Sure. $$d = 2\sqrt{\frac{A}{\pi}}$$ where d is the diameter and A is the area.

3. May 5, 2006

### Vast

excellent! thank you Curious