document.write( "Question 1036072: The new community swimming pool is pentagonal in a shape with three interior angles of 105 102 104 respectively. The other two interior angles have measures of 8x-11 and 4x. Find the measure of two missing angles
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #650663 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! The number of degrees in a pentagon is found by 180(n-2) = 180(5-2) = 180(3) = 540 degrees. Since 311 degrees are spoken for in the three given angles, the two missing one must sum up to 540-311 = 229 degrees. Thus we write \n" ); document.write( "8x - 11 + 4x = 229 \n" ); document.write( "12x - 11 = 229 \n" ); document.write( "12x = 240 \n" ); document.write( "x = 20 \n" ); document.write( "so that the two angles are \n" ); document.write( "8(20) - 11 = 149 degrees and \n" ); document.write( "4(20) = 80 degrees \n" ); document.write( " |