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Q: How do you find radius if given there an angle?

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If the radius is 8cm and the central angle is 70, how do yu workout the chord lenght?

Length = angle˚/360˚ x 2∏r

If the central angle is 70 and the radius is 8cm, how do you find out the chord lenght?

Full circumference of the circle = (2 pi) times (radius)Arc is a fraction of the full circumference.The fraction is (angle subtended at the center) divided by (360 degrees).If you have the radius 'R' and the angle 'A', the length of the arc is(pi) (R) (A) / 180

You cannot. The angle of the sector MUST be given, although that might be implicitly rather than explicitly.

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(arc length / (radius * 2 * pi)) * 360 = angle

If the radius is 8cm and the central angle is 70, how do yu workout the chord lenght?

you will need to know the angle subtended by the arc; arc length = radius x angle in radians

With the information given, you cannot. You need the radius or the central angle.

To find the arc length given the radius and angle measure in degrees, you must first convert the angle from degrees to radians, using the formula: Degrees = Radians X (pi/180). Then take the radians and the radius that you are given, and put them into the formula of Q = (a/r) where Q is the angle in radians, a is the arc length, and r is the radius. When you have this, simple multiply both sides by the radius to isolate the a. Once you do this, you have your answer.

Length = angle˚/360˚ x 2∏r

If the central angle is 70 and the radius is 8cm, how do you find out the chord lenght?

Full circumference of the circle = (2 pi) times (radius)Arc is a fraction of the full circumference.The fraction is (angle subtended at the center) divided by (360 degrees).If you have the radius 'R' and the angle 'A', the length of the arc is(pi) (R) (A) / 180

You also need the measure of the central angle because arc length/2pi*r=measure of central angle/360.

I guess you mean:"How do you find the radius if you are given the diameter?"You take the diameter and divide it by 2.

The length of an arc equals he angle (in radians) times the radius. Divide the length by the radius, and that gives you the ange. Measure out the angle on a protractor and draw the length of the radius at the begining and end of the angle. Then draw theportion of the circle with its center at the location ofthe angle and extending out to the radius.

Radius: A line from the center of a circle to a point on the circle. Central Angle: The angle subtended at the center of a circle by two given points on the circle.