document.write( "Question 40618: My Question\r
\n" );
document.write( "\n" );
document.write( "A piece of string 25 cm long goes exactly once around the edge of a plate in the form of a quadrant. Calculate the area of the quadrant. \n" );
document.write( "
Algebra.Com's Answer #26233 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! A quadrant (of a circle) has a perimeter of 2r + (1/2)(pi)r \n" ); document.write( "If that equals 25, we can solve for r and then plug that into the formula for the area of it...A = (1/4)(pi)r^2 \n" ); document.write( "so we have \n" ); document.write( "2r + (1/2)(pi)r = 25 \n" ); document.write( "r = 25 / (2 + (1/2)(pi)) \n" ); document.write( "A = (1/4)(pi)r^2 \n" ); document.write( "A = (1/4)(pi)(25 / (2 + (1/2)(pi)))^2 \n" ); document.write( "you can work out the exact value if needed... \n" ); document.write( " |