document.write( "Question 809043: The diameter of the cone in this hat is 18cm. Its slant height, s cm, is 21 cm. What is the height of the hat?
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #487363 by Cromlix(4381)\"\" \"About 
You can put this solution on YOUR website!
Right angled triangle question.
\n" ); document.write( "Divide diameter by 2 to obtain
\n" ); document.write( "the radius.
\n" ); document.write( "18/2 = 9cm.
\n" ); document.write( "Base side of triangle = 9cm.
\n" ); document.write( "Hypotenuse of triangle =
\n" ); document.write( "slant height = 21cm
\n" ); document.write( "Vertical side = height
\n" ); document.write( "Hypotenuse^2 - Base side^2 = Height^2
\n" ); document.write( "21^2 - 9^2 = Height^2
\n" ); document.write( "Height^2 = 360
\n" ); document.write( "Height = \"sqrt%28360%29\"
\n" ); document.write( "Height = 18.97cm (Two decimal places)
\n" ); document.write( "Hope this helps.
\n" ); document.write( ":-)
\n" ); document.write( "
\n" );