document.write( "Question 595453: Would like to know how to figure the square footage of a triangle 47 by 47 by 18, this is on a constuction site, so do not know the height. Would like to know if there is a formula to use when the height is not known, need to figure out the square feet in the triangle shape. Thank you \n" ); document.write( "
Algebra.Com's Answer #377148 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! This triangle has two equal sides, an isosceles triangle, with a base of 18, can be made up of two right triangles. Find the height using pythag \n" ); document.write( "h = \n" ); document.write( "h = 46.13 \n" ); document.write( ": \n" ); document.write( "Find the area: \n" ); document.write( "A = .5*b*h \n" ); document.write( "A = .5*18*46.13 \n" ); document.write( "A ~ 415 sq/units \n" ); document.write( " |