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pentagon exterior angles

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Manager
Joined: 01 Dec 2007
Posts: 52

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08 Nov 2008, 02:36
expalin?

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Director
Joined: 23 May 2008
Posts: 756

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08 Nov 2008, 03:09
i think 720

(outside angles - inside angles) * 2
so (900-540) * 2
Intern
Joined: 07 Nov 2008
Posts: 31

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08 Nov 2008, 04:37
angle 1 = angle 2 = 180 - angle A
all marked exterior angles = [180*5-(A+B+C+D+E)]*2
A+B+C+D+E = (5-2)*180

so 720, A

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Re: pentagon exterior angles   [#permalink] 08 Nov 2008, 04:37
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pentagon exterior angles

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