You can't. You don't have enough information.
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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.