WebOct 8, 2016 · The telescope maker's approximate formula for the radius of curvature of a mirror surface is s = r^2/2R, where r is half the mirror diameter, s is the radius of curvature of the surface (half the focal length), and R is the saggita (depth of the curve). WebJul 26, 2024 · Finding the Radius from the Diameter of Circle: The diameter of a circle is calculated by the formula d= 2r d = 2 r. This can be written as r = d 2 r = d 2. Where r r is the radius and d d is...
Radius of a Circle Calculator
WebJul 3, 2024 · Pi is the fixed ratio used to calculate the circumference of the circle You can calculate the circumference of any circle if you know either the radius or diameter. The formulas are: C = πd C = 2πr. where d is the diameter of the circle, r is its radius, and π is pi. So if you measure the diameter of a circle to be 8.5 cm, you would have: WebHow would you find out the area of a circle if you have only got the diameter? • 2 comments ( 6 votes) Nicholas 5 years ago All you have to do is divide the circumference by 2 to get the radius, then follow the formula of pi * r^2 2 comments ( 10 votes) Show more... brochure for ngo
Radius & diameter from circumference (video) Khan Academy
WebRadius of a circle = Diameter/2 Or Diameter of a circle = 2 x Radius Equation The equation of a circle includes the radius and it is given by: (x-h)2 + (y-k)2 = r2 Where (h,k) is the center of circle. Radius of circle from Area Since, the formula for area of a circle is given by: Area of circle = π (Radius)2 Therefore, Radius2 = Area/π WebSix of the sectors have a central angle measure of one radian and an arc length equal to length of the radius of a circle. The seventh sector is a smaller sector. The seven … WebDec 14, 2024 · To find the radius of a circle with a circumference of 10 centimeters, you have to do the following: Divide the circumference by π, or 3.14 for an estimation. The result is the circle's diameter, 3.18 … brochure for non profit