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Five angles of a pentagon have degrees

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Five angles of a pentagon have degrees [#permalink] New post 01 Jul 2004, 17:01
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Five angles of a pentagon have degrees respectively:x,2x,2x,2x,3x. Find value of 3x angle?
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Re: PS pentagon [#permalink] New post 01 Jul 2004, 17:45
boksana wrote:
Five angles of a pentagon have degrees respectively:x,2x,2x,2x,3x. Find value of 3x angle?


The sum of the interior angles is 180*(5-2)=540

=> x+2x+2x+2x+3x=540
=> 10x=540 => x=54
=> 3x angle =3*54=162
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Re: PS pentagon   [#permalink] 01 Jul 2004, 17:45
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