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An arc of a circle measures 30 centimeters and the radius measures 10 centimeters. in radians, what is the measure of the central angle that subtends the arc?

Respuesta :

length 0f an arc = r*theta   where r = radius and theta is the angle in radians

30 = 10 * theta
theta = 3 radians

angle subtended at centre =  3 * 180  / pi = 171.9 degrees to nearest thenth 

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