The formula for circumference of a circle is <span>πd. I'm not sure if your teacher has specified if they would like you to use 22/7, 3.14, or the </span><span>π button on a calculator, so I'l just do all of them. 22/7*4 = 88/7, or 12 4/7. If you were to use 22/7, the circumference would be approximately 12 4/7 inches. 3.14*4 = 12.56. If you were to use 3.14, the circumference would be approximately 12.56 inches. If you were to use the </span><span>π button on a calculator, the circumference, rounded to the nearest hundredth, would be approximately 12.57 inches. Hope that helped you!</span>
