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If the central angle is 70 and the radius is 8cm, how do you find out the chord lenght?
all you have to do is find a line with two endpoints on the circle also a diameter is the longest chord on a circle that runs through the middle of the circle.
you have a triangle formed by the radius on 2 and the chord on the other. the angle in that triangle that is opposite the chord, find its measure in radians take that measure (in radians) and multiply it by the radius to get the arc length
An amazing chart of the Hiragana alphabet can be downloaded and printed off of the website Japanese-Lesson, a website dedicated to helping others learn Japanese.
Unless the chord is the diameter, there is no way to measure the radius of the circle. This is because the radius is in no way dependent on chord length since circles have infinite amount of chord lengths.