Anonymous. Area of a circle = π r². The diameter of a circle is the straight line passing through the center of the circle. Area = Pi x 3^2 = 9Pi square units. any specific unit, the circumference is in centimeters too. Diameter = Circumference / Pi = 6Pi / Pi = 6. the radius. Circumference. The circumference of the circle is just a percentage of the circumference (perimeter) of the square, and it's the same percentage no matter what the size. So we can plug in 2 for r in the formula. So the circumference is 14π units. It is also called as the longest chord of the circle. Units: Note that units of length are shown for … Hope that helps :) 0 0? That is, the circumference would be the arc length of the circle, as if it were opened up and straightened out to a line segment. Answer Save. Circumference or perimeter of a circle is defined as the distance around it. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns. ... the formula is pi x radius squared (?r²) yet with the intention to try this, you should first locate the diameter. Volumes are measured in cubic units like cm³, feet³ etc Answer: 12.56 units Step-by-step explanation: To find the circumference of a circle, start with the formula for the circumference of a circle which is shown below. Both area and perimeter can be calculated with simple formulas using … If radius is in centimeters, as (2 * pi) is a number without . Use this circle calculator to find the area, circumference, radius or diameter of a circle. Relevance. Area of a circle is defined as π r2 and the diameter as 2r. well if the formula for area is π*r^2 . what is the circumference of a circle if the area is 1384.74 units squared? The area is measured in units units such as square centimeters $(cm^2)$, square meters $(m^2)$, square kilometers $(km^2)$ etc. Length width distance breadth height perimeter circumference is measured plain units like cm, feet etc. In geometry, the circumference (from Latin circumferens, meaning "carrying around") is the perimeter of a circle or ellipse. 6 years ago. The circumference of the circle -- the line around the outside of the circle -- can be calculated in the same way. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. The area (A) of a circle is how much space the circle takes up or the region enclosed by the circle. Radius = Diameter / 2 = 6 / 2 = 3. Circumference of (the same) circle = 2 π r. given the area, solve for r...then calculate the circumference [your teacher has given you an 'approximation' for π ] Believe it or not, that percentage is 78.5% again. Diameter = Circumferece / ? Notice that here, the radius of our circle is 2 units. More generally, the perimeter is the curve length around any closed figure. A circle is the set of all points in a plane that are a fixed distance, called the radius, from a fixed point, called the center. Conclusion : The unit of the circumference is the same as the unit of. 10 years ago. Guest Aug 17, 2017 #2 +178 +1 . Areas are measure in square units like cm², feet² etc. circumference = 2 * pi * radius. √ = square root Calculator Use. This online diameter to circumference converter helps you to find the perimeter value from the given diameter at desired units. Plugin the value and you can solve problem c. 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