document.write( "Question 1128629: A polygon has two of its interior angles to be 120 each and others are 150 each. calculate the number of sides of the polygon \n" ); document.write( "

Algebra.Com's Answer #745108 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "2*120 + 150*(n-2) = 180*(n-2)\r\n" );
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document.write( "240 = 180*(n-2) - 150*(n-2)\r\n" );
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document.write( "240 = 30*(n-2)   ====>  n-2 =  = 8   ====>  n = 8+2 = 10.   Answer.\r\n" );
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