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# Arc Area

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Manager
Joined: 09 Oct 2008
Posts: 93

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22 Oct 2008, 19:27
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

PFA
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Senior Manager
Joined: 04 Aug 2008
Posts: 372

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22 Oct 2008, 21:09
Upper portion has to be 180 degrees

knowing that 35 angle produces OP being 70 as well as QR being 70
PQ is 180-140=40

40/360 = 1/9pi times 18 = 2pi
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Senior Manager
Joined: 29 Mar 2008
Posts: 348

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22 Oct 2008, 21:35
spiridon is correct.

In case you wanted an explanation with the figure:
7-p493910
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Intern
Joined: 03 Mar 2008
Posts: 46

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22 Oct 2008, 21:40
spiridon wrote:
Upper portion has to be 180 degrees

knowing that 35 angle produces OP being 70 as well as QR being 70
PQ is 180-140=40

40/360 = 1/9pi times 18 = 2pi

good one spiridon !
Re: Arc Area   [#permalink] 22 Oct 2008, 21:40
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# Arc Area

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