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Finish your calculation by multiplying the result from Step 2 by π. The result is the volume of your sphere in cubic feet. To conclude the example, it works out to: π × 8 5. 3 3 f e e t 3 = 2 6 7. 9 4 f e e t 3. \pi \times 85.33\text { feet}^3=267.94\text { feet}^3 π ×85.33 feet3 = 267.94 feet3.Find the area with this circle area formula: Multiply Pi (3.1416) with the square of the radius (r). Area = 3.1416 x r squared. The radius can be any measurement of length. This calculates the area as square units of the length used in the radius. Example: The area of a circle with a radius (r) of 3 inches is: Circle Area = 3.1416 x 3 squared.She determines the surface area of material she needs to create her hat with a radius of 1 foot and a height of 0.5 feet as follows: lateral SA = π × 0.4√ 0.4 2 + 0.5 2 = 0.805 ft 2. Cube. The surface area of a cube can be calculated by summing the total areas of its six square faces: SA = 6a 2 where a is the edge length Our octagon area calculator is capable of finding the radii of the circumscribed and inscribed circles. You can notice that the circumradius is simply half of the length of the longest diagonal: R = l/2 = a / 2 * √ (4 + 2√2) Similarly, the inradius is the same as the apothem, which is just half of the octagon's height:Square Calculator. Enter the side length, area, diagonal or perimeter and the other values are calculated live. Square Quadrilaterals Rectangle Calculator Geometry Index. Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. For K-12 kids, teachers and parents.Octagon Area. The Area of an Octagon calculator computes the area of a regular Octagon given the length of sides (s).To apply the formula, assume the side of a square is given to be 2 inches. Then the perimeter is simply 2 x 4 = 8 inches. For a real-world example, take a square pool that you need to encompass in rope completely. One side measures 10 meters. To find the perimeter of the square pool just multiply 10 by 4 to get 40 meters.0.0872685 square yards (yd²) 0.785417 square feet (ft²) 113.1 square inches (in²) Use the this circle area calculator below to find the area of a circle given its diameter, or other parameters. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. You can also see at the bottom of ...Aug 1, 2023 · The area of a sector with a central angle α = 90° of a circle with radius r = 1 is π/4. To calculate this result, you can use the following formula: A = r² · α/2, substituting: r = 1; and. α = 90° · π/180° = π/2. Thus: A = (1² · π/2)/2 = π/4. Notice that this is also a quarter of the area of the whole circle. To calculate the concrete volume needed for this type of slab, you need to know the circle's diameter and the depth of this slab.. Formulas. Area. A = π * D² ÷ 4. Perimeter. P = π * D. Volume. V = π * D² ÷ 4 * (d ÷ 12) where A is the area in square feet, p = 3.14159265358979, D = diameter of circle P is the perimeter in lineal feet, p ...The major diameter length is 7.6 cm and the minor diameter length is 4.8 cm. To find the major and minor radii, we need to halve the diameters. This means that the major radius length is 7.6 ÷ 2 = 3.8 cm. The minor radius length is 4.8 ÷ 2 = 2.4 cm. The formula for the area of an oval is: A = π a b.To calculate circumference ( C) from a circle's diameter, multiply the diameter by π, or C = π_d_. To calculate circumference from a circle's radius, multiply the radius by 2, and then multiply the result by π, or C = 2_r_π. If you need to convert into feet from another unit of measure, you can do it before or after performing this ...SF = πr² = πd²/4 For example, to know how to find the square feet of a circle with a 1524 cm radius, follow these steps: Convert 1524 cm to ft by dividing it by 30.48. The radius in cm would be: (1524/30.48) ft = 50 ft Learn more about this in our length converter. Input the radius in the SF formula: SF = π (50 ft)² = 7854 ft²Area of a circle in terms of circumference: Area = C2 4π = 100.52 4π = 10100.25(4·3.14) = 10100.2512.56 = 804.2 square feet (*) (*) 804.24771931899 feet, exactly or limited to the precision of this calculator (13 decimal places). Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.The calculator can be used to calculate. the number of pipes - or wires - that fits within a conduit or similar applications. Input the rectangle inside dimensions - height and width and the circles outside diameters. Default values are for 0.5 inch circles inside a 10 inch x 10 inch square. The calculator is generic and any kind of units can ...

Your calculations would look like this: 16 x 18 = 288 square feet. 4 x 8 = 32 square inches. 32 / 144 = 0.22 square feet. 288 / 0.22 = 1,310 pavers needed. And to find the amount of sand base, you would follow these steps: 16 x 18 = 288 square feet. 288 x 144 = 41,472 square inches. 41,472 x 2 = 82,944 cubic inches.In this example, let's assume you want to calculate the volume of a cylinder. Type your data into the proper boxes. Our cylinder has a radius of 1 ft and a height of 3 ft. You can change the units by a simple click on the unit name. Here you go! The volume of a chosen shape is displayed. In our case, it's 9.42478 cu ft.Area of a circle in terms of circumference: Area = C2 4π = 40.842 4π = 1667.91(4·3.14) = 1667.9112.56 = 132.7 square feet (*) (*) 132.73228961417 feet, exactly or limited to the precision of this calculator (13 decimal places). Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.Enter the dimensions in feet and inches and the calculator will show the area in square feet, meters, inches, and acres. Calculate the area of a rectangle.

A sector of a circle is essentially a proportion of the circle that is enclosed by two radii and an arc. Given a radius and an angle, the area of a sector can be calculated by multiplying the area of the entire circle by a ratio of the known angle to 360° or 2π radians, as shown in the following equation: area =. θ. 360. Weight Calculator. Select Your Metal: Select a Shape: Number of Pieces: Enter size information: Calculated Weights. Approx. weight in kg*. Approx. weight in lbs*. *These weights should be used for estimation purposes only.The volume of a cylinder in cubic feet is equal to π times the square of the base’s radius r in feet squared times the cylinder’s height h in feet. π is roughly equal to 3.14159265359. π = 3.14159265359. If you know the diameter of the cylinder, you can find the radius by dividing the diameter by two, or just use our circle diameter ... …

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Use this calculator to find the square footage, squa. Possible cause: This square foot calculator determines the square footage of a room, lot, land, pro.