# surface area of a circle calculator

Hexagon area formula: how to find the area of a hexagon. Total surface area: S sector = S cap + S base: h = R(1 - cosθ) In the above case we had a sector with γ = 0 and r 1 = 0. Formula. All of the objects addressed in this calculator are described in more… Enter any of the four circle values, area, radius, diameter or circumference, click on Calculate and the other three values are returned in full (up to 18 decimal places) and maximum 3 decimal place rounded values. 31,490 2) A circular spa has a 10 foot diameter and a constant depth of 4 feet deep. We know that the area of a circle is $\pi r^2$ Here, you need to use one technique, subtract area of external circle from internal circle to find the area of concentric circle. In the result you will get all unknown variables presented. Note the number of square units it takes to fill it. The surface area is displayed. Definition: The number of square units it takes to fill a segment of a circle Try this Drag one of the orange dots that define the endpoints of the segment. The easiest way is to use our hexagon calculator, which includes a built-in area conversion tool. Look at this disc: Suppose that it has a thickness equal to $h$ and a radius $r$. To find the area using the radius, or the length from the center of the circle to the edge, use the formula area = πr^2, where r is the radius. In general, you can skip the multiplication sign, so 5x is equivalent to 5*x. Here the Greek letter π represents a constant, approximately equal to 3.14159, which is equal to the ratio of the circumference of any circle to its diameter. An area is the size of a two-dimensional surface. Determine the Area of a Circle Click here to choose anothe area calculator The area of a circle can be determined by using the following formula: where d is the diameter of the circle, which is exactly twice the length of its radius (r). Area of a Semicircle Calculator A semicircle is nothing but half of the circle. Calculate the total surface area of a regular pyramid if given base perimeter, slant height and base area ( A ) : lateral surface area of a regular pyramid: = Digit 1 2 4 6 10 F Method 1 (using the area of a whole circle and dividing by 4) First work out the area of the whole circle by substituting the radius of 8cm into the formula for the area of the circle: A = π ×r² = π ×8² = 64π (leave the answer as an exact solution as this need to be divided by 4). If you fill in m, than the surface is m 2. Area of a Circle Calculator. This tool will calculate the diameter of a circle from the area, and will convert different measurement units for area and diameter. Surface area is the sum of all the areas of all the shapes that cover the surface of an object. Version 1.1.0 - More livelier User Interface - Better symbol for pi - About section Version 1.0.0 Calculates the area of the following 2D shapes. Online calculators and formulas for a surface area … For example, if the radius of the circle is 6 inches, first you would square 6 and get 36. An area is the size of a two-dimensional surface. Sphere surface area to diameter calculator; User Guide. In geometry, the area enclosed by a circle of radius r is πr2. Surface Area = 2(pi r 2) + (2 pi r)* h In words, the easiest way is to think of a can. Find Surface Area of different objects like Cone, Cube, Cylinder, Pipe, Prism, Pyramid, Rectangular Box, Sphere, Torus (Ring), Tube and more Please enter valid values for Radius of base of pipe(R), Height of pipe(H) and click 'Calculate' So the area of a semicircle is when you cut a full circle into half you get the area of a semicircle. Now it’s not only easy, but also lightning fast. Therefore, the radius of the external circle is $21 + 3.5$ meters and it is $24.5$ meters. 1) A rectangular pool is 60 feet long by 30 feet wide. Solve the Common Geometry Problem Today With Our Area Of A Circle Calculator. You need to fill in the radius. Our cylindrical tank calculation tool performs all the calculations for you. area = Pi * radius 2 Enter either the radius or the diameter. Conveniently, it is twice as long as the radius of a circle. Calculator online for a the surface area of a capsule, cone, conical frustum, cube, cylinder, hemisphere, square pyramid, rectangular prism, triangular prism, sphere, or spherical cap. Surface Area Calculator The surface area of a solid is a measure of the total area occupied by the surface of an object. Including a calculator. If you know the diameter or radius of a circle, you can work out the circumference. This calculates the area as square units of the length used in the radius. You can use numerous different inputs and choose to submit the radius, the diameter or the circumference of the circle. That's the formula for area of a circle (pi r 2). Find the surface area and the volume. An online circumference calculator that allows you to find circumference, radius, diameter, area, sphere surface area, and sphere volume of a circle. I will consider a 3D (real) disc for this answer (therefore, a cylinder that has a small thickness). In the calculator mentioned below, you can calculate the area of a circle. The formula for working out the circumference of a circle is: Circumference of circle = π x Diameter of circle. JavaScript: Area and circumference of a circle. The area of a circle is: ... Estimate of Circle's Area = 80% of Square's Area = 80% of 9 = 7.2 m 2. The calculator will find the area of the surface of revolution (around the given axis) of the explicit, polar or parametric curve on the given interval, with steps shown. For instance, we can calculate the surface area of a sphere, a cone or even the surface area of a cylinder. Math Open Reference. Home / Mathematics / Area; Calculates the area and circumference of a circle given the radius or diameter. Circle Area Calculator; Circle Circumference Calculator; Diameter Calculator. area_circle online. We will now have a look at how to find the area of a hexagon using different tricks. This program is compiled and tested on a Visual Studio 2012.. HP 15 Core i3 7th gen Laptop(4GB, 1TB HDD, Windows 10) | Rs. You can find the area of the top (or the bottom). The area of internal circle … Enter the radius, diameter, circumference or area of a Circle to find the other three. Find the area with this circle area formula: Multiply Pi (3.1416) with the square of the radius (r) 2. You can also calculate the radius if you fill in the area. Calculating the volume and surface area of a right cylinder is not that difficult, though it can be tricky, especially if you don’t remember the formula. You can use the cylindrical tank surface area calculator to find the surface area of a cylindrical tank: Enter the length of the base radius (r). Equation form: Explore the area or volume calculator, as well as hundreds of other calculators addressing math, finance, fitness, health, and more. Since a circle is 2 – dimensional, its surface area is the same as its area. The integral is made from two pieces: The arc-length formula, which measures the length along the surface To begin with, remember that pi is an irrational number written with the symbol π. π is roughly equal to 3.14. Find the surface area and the volume. Radius: Diameter: Circumference: Area: For help with using this calculator, see the shape area help page.. Return to the Shape Area … Applications This calculation is useful as part of the calculation of the volume of liquid in a partially-filled cylindrical tank. The radius can be any measurement of length. Example: The area of a circle with a radius(r) of 3 inches is: Circle Area = 3.1416 x 3 2 Calculate the unknown defining side lengths, circumferences, volumes or radii of a various geometric shapes with any 2 known variables. You only have to know that the unit of the surface is derived of the length. Sector surface area of the spherical section is: Surface area of the outer cone: S 2 = πRr 2. To find the area of a surface of revolution between a and b, use the following formula: This formula looks long and complicated, but it makes more sense when you spend a minute thinking about it. The diameter of a circle is the distance from edge to edge of a circle passing through its origin or center. The formula used to calculate the circle diameter is: ø = 2 x √(A / π) Symbols. Also, explore the surface area or volume calculators, as well as hundreds of other math, finance, fitness, and health calculators. Formula to calculate surface area (S.A.) of a circle. This calculator is designed to give all of the mathematical values of a circle and sphere from only one entered data value. Square Rectangle Triangle Parallelogram Trapezoid Rhombus Kite Regular polygon Circle Ellipse Segment of a circle Annulus Calculates the surface area of the following 3D shapes. The shallow end is 4 feet deep and the deep end is 8 feet deep. C# Program to Calculate Area of Circle. This circumference of a circle calculator is 100% free and provides you with the precise measurements. To find out the area of a circle, we need to know its diameter which is the length of its widest part. The area of a circle is the space contained within its circumference (outer perimeter). To find out the area of a circle border, we need to know its inner diameter and the width of the circular border. Area of a circle Calculator . It does not matter in what units you fill in. We know the formula to calculate area of a circle is πr^2, by dividing this by 2 we will get the area … Show Instructions. 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. This free surface area calculator determines the surface area of a number of common shapes, including sphere, cone, cube, cylinder, capsule, cap, conical frustum, ellipsoid, and square pyramid. The surface area is the areas of all the parts needed to cover the can. That's the top, the bottom, and the paper label that wraps around the middle. The circumference of a circle is the linear distance around its edge. For those who want to know how to do this by hand, we will explain how to find the area of a regular hexagon with and without the hexagon area … The area of a circle is the space contained within its circumference (outer perimeter). Area of Surface of Revolution Calculator. Just use our calculator and you’ll have the results in no time. Use this calculation to calculate the area of a circle. Surface area of the inner cone: S 1 = πRr 1. Area of a Circle Segment Given the Central Angle. What is a Circle's Diameter? The calculations are done "live": How to Calculate the Area. Enter the length of the height (h). Home Contact About Subject Index. Area = 3.1416 x r 2. Summary : area online calculator that can calculate the area of a circle from its radius or from its diameter. If you know the central angle of the segment (the angle subtended by the segment at the center of the circle) you can use the method Area of a circular segment given the central angle. 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