If it is just the radius, it is half of the diameter. If you are given the circumference, divide the given measure value by 3.14. Then, divide the result by 2 to get the radius! Have fun! If you need any help with other math formula's just post another answer. I'll write full, complete, and correct answers that I'm sure about.
David (venom751998)
The formula for calculating the circumference of a circle is 2pr where r=radius and p (pie) = 3.1416 so for your question thr circumference = 2 x 3.1416 x 8 = 50.2656
Calculating the radius of a semicircle depends on what information about the semicircle is given.
The area of a sphere is 4 (pi) (radius)2. The area of 1/2 of the sphere is 2 (pi) (radius)2. If you want to add in the flat end of the hemisphere, that makes the total surface area 3 (pi) (radius)2.
Assuming the shape is a regular dodecagon, the formula for calculating the perimeter for a dodecagon of side length n is equal to 12n.
What do you mean 'finding'? Pi is the ratip of the circumference to the radius of a circle.
The formula for calculating the area of a circle in terms of the radius is A r2, where A represents the area and r is the radius of the circle, expressed in square units.
The formula for calculating the area of a circle is A r2, where A represents the area and r represents the radius of the circle.
The formula for calculating the inertia of a hoop is I MR2, where I is the inertia, M is the mass of the hoop, and R is the radius of the hoop.
divide diameter by 2
The formula for calculating the polar moment of inertia of a cylinder is I (/2) r4, where r is the radius of the cylinder.
Formula for calculating the area of sphere is : 4 * pi * r * r
The formula for calculating the moment of inertia of a hoop is I MR2, where I is the moment of inertia, M is the mass of the hoop, and R is the radius of the hoop.
Its Area = pi * (radius ^2 - height^2)
The formula for calculating the polar moment of inertia for a cylinder is I (/2) r4, where I is the polar moment of inertia and r is the radius of the cylinder.
Area = pi*[R2 - r2] where R is the outer radius and r the inner radius.
The formula for calculating centripetal acceleration in terms of the radius of the circular motion is a v2/r, where "a" represents the centripetal acceleration, "v" is the velocity of the object in circular motion, and "r" is the radius of the circle.
The formula for calculating power (p) in a system is p v2/r, where v represents velocity and r represents radius.