L = (((ROLL x ROLL) - (CORE x CORE)) x 3.14) / (48 x Thick)
Assuming the shape is a regular dodecagon, the formula for calculating the perimeter for a dodecagon of side length n is equal to 12n.
You are calculating the length of a line segment
hypotenuse
The hypotenuse
6(pi)l2, where l = length of side
The formula for calculating strain is: Strain Change in length / Original length. The formula for calculating stress is: Stress Force applied / Cross-sectional area.
The formula for calculating the linear packing fraction of a material in a given space is: Linear Packing Fraction (Sum of diameters of all spheres) / (Length of the space)
Density or weight is calculated by mass/volume
The formula for calculating the angular magnification of a telescope is: Magnification focal length of the objective lens / focal length of the eyepiece.
The formula for calculating the focal length of a lens is: 1/f 1/do 1/di where f is the focal length of the lens, do is the object distance, and di is the image distance.
The formula for calculating the length of a chord in a circle is (2rsin(frac2)), where r is the radius of the circle and is the central angle subtended by the chord.
There is none since an angle does not have a length.
Assuming the shape is a regular dodecagon, the formula for calculating the perimeter for a dodecagon of side length n is equal to 12n.
You are calculating the length of a line segment
hypotenuse
hypotenuse
Its hypotenuse