document.write( "Question 708529: three angles of a quadrilateral are given 90, 145, and 78 what is the forth angle? \n" ); document.write( "

Algebra.Com's Answer #436126 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "The sum of the interior angles of any quadrilateral is 360.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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