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# How can you differentiate inscribed angle from minor arc

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Manager
Joined: 31 Jul 2006
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How can you differentiate inscribed angle from minor arc [#permalink]  20 Jun 2008, 00:37
How can you differentiate inscribed angle from minor arc angle?
which angle (inscribed or minor arc) do you use in formula (x/360)*2pi r?
Manager
Joined: 31 Jul 2006
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Re: inscribed angle/minor arc angle [#permalink]  20 Jun 2008, 00:52
No, cause i came across this question in OG 206
where it says, minor arcs always have twice the measure of their inscribed angles. Since inscribed angle PRO is 35 deg, the measure of minor arc OP is 70 deg (not length, but deg).
Now i'm really confused.
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Re: inscribed angle/minor arc angle [#permalink]  20 Jun 2008, 00:55
http://en.wikipedia.org/wiki/Inscribed_angle

An inscribed angle is angle created when two chords with same endpoint meet.

The formula you have mentioned is to find the length of an arc, and

= x/360 * (2 pi r ) , where x is angle subtended by arc
Re: inscribed angle/minor arc angle   [#permalink] 20 Jun 2008, 00:55
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