document.write( "Question 1174443: Edwin is building a skateboarding ramp by propping the end of a piece of wood on a cinder block. If the ramp starts 72 centimeters from the cinder block and the piece of wood is 90 centimeters long, how tall is the cinder block?
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #799841 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "Hi\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "According to the diagram:\r\n" );
document.write( " h = 90cm\r\n" );
document.write( " a = 72cm\r\n" );
document.write( " b = height of cinder block\r\n" );
document.write( "Pythagorean theorem:  a^2 + b^2 = h^2\r\n" );
document.write( "  72^2 + b^2 = 90^2\r\n" );
document.write( "use Your Calculator: b^2 = 90^2 - 72^2 = 2916\r\n" );
document.write( "    b = √2916 = 54cm       (tossing out negative solution for length)\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Wish You the Best in your Studies.\r\n" );
document.write( "

\n" ); document.write( " \n" ); document.write( "
\n" );