Measurement of arch

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sanjib
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Topic: Measurement of arch

Fri Jul 03, 2009 7:56 am

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See the picture in the attachment please.

What is the circumference of the circle in the attachment.
(1) The length of arc XYZ is 18.
(2) r = s

Need explanation please :
if the angle made in the circle are based on the circle points as vertex , is the angle double if it is made by one point was in the centre .

El Cucu
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Fri Jul 03, 2009 12:42 pm

sanjib wrote: See the picture in the attachment please. What is the circumference of the circle in the attachment. (1) The length of arc XYZ is 18. (2) r = s Need explanation please : if the angle made in the circle are based on the circle points as vertex , is the angle double if it is made by one point was in the centre . I can�t see the attached. However, if the central angle or the inscript angle is given in the drawing, you can find the radius and then the circumsference.