There is none since an angle does not have a length.
You can use the cosine rule to calculate the central angle.
For a circle: Arc Length= R*((2*P*A)/(360)) R being radius, P being pi (3.14159), and A being the measure of the central angle.
The formula for calculating the measure of an acute angle is not specific, as the measurement of an angle is determined by the degree of rotation between two lines. However, in a right triangle, the acute angles can be calculated using the trigonometric functions such as sine, cosine, and tangent.
90 degree
That depends what you want to calculate.
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.
You can use the cosine rule to calculate the central angle.
Angle Side Angle
The formula for calculating the angle of deviation in a prism is: Angle of Deviation (Refractive index of the prism - 1) x Prism angle.
This is the formula for calculating a taper: Large diameter of the taper minus the small Diameter of the taper divided by the length of of the taper will give you the taper per inch. You will also need to know the included angle of the taper if you ar cutting this taper. This formula would be Tangent of the included angle divide by 2.
The formula for calculating the amplitude of a pendulum is given by the equation: amplitude maximum angle of swing.
The formula for calculating the angle of incidence is: Angle of Incidence = Angle of Reflection. The angle of incidence is the angle between the incident ray and the normal to the surface at the point of incidence.
For a circle: Arc Length= R*((2*P*A)/(360)) R being radius, P being pi (3.14159), and A being the measure of the central angle.
Using a protractor is the easiest formula
The formula for calculating the measure of an acute angle is not specific, as the measurement of an angle is determined by the degree of rotation between two lines. However, in a right triangle, the acute angles can be calculated using the trigonometric functions such as sine, cosine, and tangent.
An angle does not have a diameter. The arms of an 82 degree angle can be as long as you like - infinite, even.
90 degree