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# If Arc GBD is 280 and deg what is the measure of angle three?

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## Related Questions

###### Asked in Geometry

### How do you find the arc length with the angle given?

An arc can be measured either in degree or in unit length. An
arc is a portion of the circumference of the circle which is
determined by the size of its corresponding central angle. We
create a proportion that compares the arc to the whole circle first
in degree measure and then in unit length.
(measure of central angle/360 degrees) = (arc
length/circumference)
arc length = (measure of central angle/360
degrees)(circumference)
But, maybe the angle that determines the arc in your problem is
not a central angle. In such a case, find the arc measure in
degree, and then write the proportion to find the arc length.

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