document.write( "Question 288845: An isosceles right triangle has an area of 98 square units, what is the perimeter? \n" ); document.write( "
Algebra.Com's Answer #209312 by dabanfield(803)![]() ![]() ![]() You can put this solution on YOUR website! Let x be the length of the common leg. Then both the base and the height of the triangle are x so the area is:\r \n" ); document.write( "\n" ); document.write( "1/2*base*height = 98 \n" ); document.write( "(1/2)*x*x = 98 \n" ); document.write( "x^2/2 = 98 \n" ); document.write( "x^2 = 2*98 \n" ); document.write( "x^2 = 196 \n" ); document.write( "x = 14\r \n" ); document.write( "\n" ); document.write( "Let h be the hypotenuse. Then, by the Pythagorean Theorem, we have;\r \n" ); document.write( "\n" ); document.write( "h^2 = x^2 + x^2 \n" ); document.write( "h^2 = 2*(x^2) \n" ); document.write( "h = x*sqrt(2) \n" ); document.write( "h = 14*sqrt(2)\r \n" ); document.write( "\n" ); document.write( "The perimeter then is x + x + h = 14 + 14 + 14*sqrt(2) = 14*(2 + sqrt(2)) \n" ); document.write( " |