WebNov 16, 2024 · A = πr^2 A = πr2 A represents the area of the circle, and r is its radius. Substitute the length of your circle's radius into the formula. Remember: if you want your answer to be in square feet, then the radius must be measured in feet, too. Imagine you have a circle of radius 20 feet. Substituting 20 for r in the formula gives you: Webif the diameter is given we find the circumference by diameter x pi, so if the radius is half the value of the diameter then if you are only given the radius we find the circumference by radius x 2 x pi because radius x 2 = diameter 12 comments ( 93 votes) Upvote Show more... Blake Terryberry 2 years ago
Radius, diameter, & circumference Circles (article) Khan Academy
WebFeb 2, 2024 · Use the formulas to calculate the circumference and area: c = 2πr and A = πr². The circumference should equal c = 2π × 8 cm = 50.265 cm. The area should equal A = π × (8 cm)² = 201.06 cm². To check your results, input the 8 cm diameter in the calculator. The results should also be 50.265 cm and 201.06 cm². Other awesome Omni Calculators WebCircumference: the distance around the circle, or the length of a circuit along the circle. Arc: part of the circumference of a circle Major arc: an arc that is greater than half the … grant plumbing supply nj
How to Measure 1 Acre in Feet Sciencing
WebCalculate square footage, square meters, square yardage and acres for home or construction project. Calculate square feet, meters, yards and acres for flooring, carpet, or tiling projects. Enter measurements in US or … WebSphere Shape r = radius V = volume A = surface area C = circumference π = pi = 3.1415926535898 √ = square root Calculator Use This online calculator will calculate the 3 unknown values of a sphere given any 1 … WebDec 14, 2024 · To find the area of a circle from the circumference, follow these steps: Divide the circumference by π. Divide the result by 2 to get the circle's radius. Multiply the radius by itself to get its square. Multiply … grant plumbing \u0026 heating