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Arc Area

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Manager
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Joined: 09 Oct 2008
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Arc Area [#permalink]

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New post 22 Oct 2008, 20:27
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

PFA
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arcarea.JPG [ 39.46 KiB | Viewed 782 times ]

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Senior Manager
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Re: Arc Area [#permalink]

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New post 22 Oct 2008, 22:09
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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Re: Arc Area [#permalink]

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New post 22 Oct 2008, 22:35
spiridon is correct.

In case you wanted an explanation with the figure:
7-p493910
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Re: Arc Area [#permalink]

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New post 22 Oct 2008, 22:40
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 !

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Re: Arc Area   [#permalink] 22 Oct 2008, 22:40
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