# What does it mean when you have a dark circle around your mouth and how to get rid of that?

It usually indicate a familial gastrointestinal syndrome.Consult your doctor,this may be serious than just a cosmetic proble. Or means that you lick arround your mouth to much .

### What does it mean when you see a circle in one eye?

You would do yourself a good deed by calling your eye doctor. Not sure if you mean you see a halo looking circle or dark small spot that moves when you look at a white background. It's probably floaters if it seems to move around when you try to look at it. They say you shouldn't try to focus on it.

### What is the diameter of a circle that is equal to pi?

If you mean the diameter of a circle with area pi, then the diameter is 2. If you mean the diameter of a circle with circumference pi, then the diameter is 2. If you mean the diameter of a circle with diameter pi, then the diameter is pi. If you mean the diameter of a circle with radius pi, then the diameter is 2pi.

### What is the length of a circle with a diameter 16centimetres?

I'm not sure what you mean by "length" of a circle. I'm going to take a wild guess and assume you mean the distance around the circle. The circumference of a circle (distance around it) is (pi) x (diameter). If the diameter is 16 centimeters, then the circumference is 16 pi = 50.2655 centimeters. (rounded)