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.
divide diameter by 2
where:C is the central angle of the arc in degreesR is the radius of the arcπ is Pi, approximately 3.142
If the central angle is 70 and the radius is 8cm, how do you find out the chord lenght?
the formula for the arc of a triangle is the arc length is equal to the angle times the radius. s=arc length theta=angle made y length of the arc lenth r=radius s=theta times radius
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 circumference of a circle is 2πr, where r is the radius of the circle and π is 3.1415926535890793 - usually shorted to either 3.1416 or 3.14 So that the circumference of a circle with a radius of 10 units is 62.83 units There are pi radians in a half of a circle. Thus, the measure of a central angle which is a straight line is pi radians. We have a formula that show that the length of an intercepted arc is equal to the product of the angle in radians that intercepts that arc, with the length of the radius of the circle. So we can say that the length of a semicircle is (pi)(r). In a full circle are 2pi radians. So the length of intercepted arc from a central angle with measure 2pi is 2(pi)(r).
divide diameter by 2
where:C is the central angle of the arc in degreesR is the radius of the arcπ is Pi, approximately 3.142
Volume = Area * Length The volume of a right circular cylinder is πr2h where r is the radius of the base and h is its height (altitude)
Its Area = pi * (radius ^2 - height^2)
Area = pi*[R2 - r2] where R is the outer radius and r the inner radius.
If the central angle is 70 and the radius is 8cm, how do you find out the chord lenght?
Area of any circle = (pi) x (Radius)2
V=4/3*Pi*r3 where r is the radius.
the formula for the arc of a triangle is the arc length is equal to the angle times the radius. s=arc length theta=angle made y length of the arc lenth r=radius s=theta times radius
(arc length / (radius * 2 * pi)) * 360 = angle