The formula used to calculate circle area is: A = π x (ø/ 2) 2. To run the calculator, hit the 'Calculate Circle Dimensions' button when you have entered the known diameter. Compute the area using these units: square mils, square inches, square feet, square yards, square miles, acres, hectares, square millimeters, square centimeters, square meters, and square kilometers. Exercise 2: The area of a circle is 35 m² (square meters). Also, explore the surface area or volume calculators, as well as hundreds of other math, finance, fitness, and health calculators. The area of some circle is known and equals 15.7 m².What we need to calculate is the radius and diameter. Solution: In this exercise we have the opposite situation. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns. Circle Formula's Radius R = D ÷ 2 where R = radius, D = diameter Area; A = π * D² ÷ 4 √ = square root Calculator Use. Remember this tool should be used only to calculate area, perimeter or volume of a figure. To calculate the area of polygons inscribed in a circle. This calculator converts the area of a circle into a square with four even length sides and four right angles. Explore many other math calculators like the area and surface area calculators, as well as hundreds of other calculators related to finance, health, fitness, and more. This free volume calculator can compute the volumes of common shapes, including that of a sphere, cone, cube, cylinder, capsule, cap, conical frustum, ellipsoid, and square pyramid. Symbols. For angles of 2π (full circle), the area is equal to πr²: 2π → πr²; So, what's the area for the sector of a circle: α → Sector Area; From the proportion we can easily find the final sector area formula: Sector Area = α * πr² / 2π = α * r² / 2 Units: Note that units of length are shown for … How long are the radius and the diameter of that circle. A = Circle area; π = Pi = 3.14159… ø = Circle diameter; Diameter of Circle. 2017/04/20 20:12 Male/60 years old level or over/A retired people/Useful/ Purpose of use The results we provide … About Square Calculator tool. Comment/Request An accuracy option that is < (less than) 6 digits in decimal form. Enter the diameter of a circle. In the result you will get all unknown variables presented. Formula used to calculate the area of circumscribed square is: 2 * r 2 where, r is the radius of the circle in which a square is circumscribed by circle. The radius of a circumcircle of a square is equal to the radius of a square. Then, we want to calculate the area of a part of a circle, expressed by the central angle. For those having difficulty using formulas manually to find the area, circumference, radius and diameter of a circle, this circle calculator is just for you. Circumscribed circle of a square is made through the four vertices of a square. Use this calculation to calculate the area of a circle. The calculation is based on the area of the square being the same as the circle's area. With this semicircle area calculator, you can quickly find the area of half of a circle.What is more, the tool also doubles as a semicircle perimeter calculator, so inputting radius or diameter will help you find the basic features of the shape in the blink of an eye.In the article below, we provide the semicircle definition and explain how to find the perimeter and area of a semicircle. You can use numerous different inputs and choose to submit the radius, the diameter or the circumference of the circle. The circle calculator finds the area, radius, diameter and circumference of a circle labeled as a, r, d and c respectively. This free area calculator determines the area of a number of common shapes using both metric units and US customary units of length, including rectangle, triangle, trapezoid, circle, sector, ellipse, and parallelogram. 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