document.write( "Question 266509: A right triangle has sides of integer length and perimeter 2010 units. The length of the shortest side is equal to one-fifth of the sum of the lengths of the other two sides. What is the area of the triangle? \n" ); document.write( "
Algebra.Com's Answer #195804 by vksarvepalli(154)![]() ![]() You can put this solution on YOUR website! let the sides be a,b & c with a being the shortest and c the hypotenuse(longest)\r \n" ); document.write( "\n" ); document.write( "the are of the triangle will be 1/2*a*b (half*base*height)\r \n" ); document.write( "\n" ); document.write( "given \r \n" ); document.write( "\n" ); document.write( "The length of the shortest side is equal to one-fifth of the sum of the lengths of the other two sides\r \n" ); document.write( "\n" ); document.write( "so a=1/5 *(b+c)\r \n" ); document.write( "\n" ); document.write( "=> 5a=b+c ------------------ 1\r \n" ); document.write( "\n" ); document.write( "and perimeter = 2010 units\r \n" ); document.write( "\n" ); document.write( "so a+b+c = 2010\r \n" ); document.write( "\n" ); document.write( "but from 1 \r \n" ); document.write( "\n" ); document.write( "we get a+5a=2010\r \n" ); document.write( "\n" ); document.write( "so 6a=2010\r \n" ); document.write( "\n" ); document.write( "so a=335\r \n" ); document.write( "\n" ); document.write( "and b+c=5a=1675\r \n" ); document.write( "\n" ); document.write( "now in a right triangle fro Pythagoras theorem we have\r \n" ); document.write( "\n" ); document.write( "c^2 = a^2+b^2\r \n" ); document.write( "\n" ); document.write( "=> c^2-b^2=a^2 \n" ); document.write( " \n" ); document.write( "=> c^2-b^2=335*335\r \n" ); document.write( "\n" ); document.write( "=> (c-b)(c+b)=335*335\r \n" ); document.write( "\n" ); document.write( "but c+b = 1675\r \n" ); document.write( "\n" ); document.write( "so (c-b)*1675=335*335\r \n" ); document.write( "\n" ); document.write( "so c-b = 67 \n" ); document.write( " c+b= 1675\r \n" ); document.write( "\n" ); document.write( "subtracting the above two we get \r \n" ); document.write( "\n" ); document.write( "2b=1608 so b= 804\r \n" ); document.write( "\n" ); document.write( "thus area=1/2 * 335 * 804\r \n" ); document.write( "\n" ); document.write( "therefore area of the triangle=134670 sq. units \n" ); document.write( " |