Plug in the area to find the radius if you know the area. If a = pi r^2 then r = the square root (sqrt) of the area divided by pi, or to put it in mathematical script, sqrt(a/pi). So, if the area is 3.14, we get
254K Discover how to find the area and circumference of a circle. Learn the area of a circle formula, the circumference of a circle formula, how to calculate the circumference of a circle, and how to calculate the area of a circle. Related...
Using the Radius Using the Radius The radius of a circle, half of its diameter, can help you find the circumference in a couple of steps. First, double the radius to get the diameter (radius x 2, or radius + radius). One you have the diameter, you can use the equation C = πd....
If the general equation of a circle is given then we have to compare the equation with the general form and, then the values of g,f, and c are found. These values will help to find the radius of the circle.Answer and Explanation: ...
Thus, the arc of a circle formula is θ times theradiusof a circle, if the angle is in radians. The arc length formula can be expressed as: arc length, L = θ× r, when θ is in radian; arc length, L = θ× (π/180) × r, where θ is in degrees, ...
To find the area of a circle, you take pi times the radius squared, or A = pi r^2. Using this formula, you can find the area of a circle if you know the radius -- or the diameter -- by plugging in your values and solving for A. Pi is approximated as 3.
The circumference a circle can also be represented in terms of the radius of the circle.We can define the radius of a circle in terms of the diameter through the relationship: \(d = 2 * r\) Substituting this into the previous equation to find circumference of the circle, we get: ...
Steps for Inscribing a Square in a Circle Step 1: If the diameter or the radius of the circle is known, find the length of the diagonal of the square using the fact that the diameter of the circle equals the diagonal of the square, or equivalently, the radius of the circle is half ...
The formula for the area of a circle is "pi x r2" where "r" is the radius of the circle. So if you have a pool with a diameter of 20 feet, the radius is 10 feet, and the formula would be calculated in this way: 3.14 x 102= 314 square feet. ...
The standard form of a circle equation In the general form,D,E, andFare given values, like integers, that are coefficients of thexandyvalues. Using the center-radius form {use-crf} If you are unsure that a suspected formula is the equation needed to graph a circle, you can test it. ...