What is circumference? Circumference is the distance around the outside of a circle (its perimeter!). Want a review of circle vocabulary terms (like pi, radius, and diameter)? Check out …

We call that word the circumference of the circle. Now, we know how the diameter and the radius relates, but how does the circumference relate to, say, the diameter.

Just as we said that the circumference could be written as two pi r or as pi times two r, two r is just the diameter. So, we could say that the circumference is equal to pi times the diameter.

Find the circumference of a circle when given either the radius or diameter. Find the radius or diameter of a circle when given the circumference.

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Unit 10: Circles, cylinders, cones, and spheres Unit mastery: 0% Area and circumference of circles Area and circumference of fractions of circles Volume of cylinders, spheres, and cones

Let's say that we have a circle that has a diameter of 10 centimeters. Based on that, what is the circumference of that circle going to be? Well, we can go to this right over here, and actually …

Good news: You do not need to remember the formulas for the circumference and area of a circle for the SAT! At the beginning of each SAT math section, the following relevant information is …

The circumference of a circle and the area of a circle have one thing in common: the radius. If I were you I'd do it in two steps: - first calculate the radius using the circumference formula, - …

It takes 2 π radians (a little more than 6 radians) to make a complete turn about the center of a circle. This makes sense, because the full circumference of a circle is 2 π r , or 2 π radius …