document.write( "Question 1163164: In triangle ABC the lines BQ and CR are perpendicular to AC and AB respectively. If BPC=100 degrees, then the size of A will be:
\n" ); document.write( "A=40 degrees B=80 C=120 D=130 E=160 \n" ); document.write( "

Algebra.Com's Answer #787170 by Edwin McCravy(20059) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The drawing is to scale.\r\n" );
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document.write( "Since you are given angle BPC, you also know angle RPQ. \r\n" );
document.write( "You are also given angles ARP and AQP, if you know what the word\r\n" );
document.write( "\"perpendicular\" means.\r\n" );
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document.write( "The sum on the 4 interior angles of any quadrilateral must have sum 360°.\r\n" );
document.write( "You know the sum of the angles of quadrilateral ARPQ, so you can easily\r\n" );
document.write( "determine angle A.\r\n" );
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document.write( "Edwin

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