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If the central angle is 70 and the radius is 8cm, how do you find out the chord lenght?
If the radius is 8cm and the central angle is 70, how do yu workout the chord lenght?
If three central angles measures 65, 87, and 112, find the measure of the fourth central angle.
Well, in degrees, the arc is congruent to its central angle. If the radius is given, however, just find the circumference of the circle (C=πd). Then, take the measure of the central angle, and divide that by 360 degrees. Multiply the circumference by the dividend, and you will get the arc length. This works because it is a proportion. Circumference:Arc length::Total degrees in triangle:Arc's central angle. Hope that helped. :D
The answer depends on what information you do have: radius, arc length, central angle etc.