document.write( "Question 845243: A triangle has a perimeter of 48 feet. The second side is 5 feet longer than the first. The third side is 3 feet longer than the first. What is the length of each side? \n" ); document.write( "
Algebra.Com's Answer #509194 by pmesler(52)![]() ![]() You can put this solution on YOUR website! Let's start off with the formula for the perimeter of a triangle.\r \n" ); document.write( "\n" ); document.write( "P = a + b + c, where a, b, and c are the lengths for the sides of the triangle.\r \n" ); document.write( "\n" ); document.write( "Since we already given the perimeter in the problem, let's go ahead and substitute that into the equation.\r \n" ); document.write( "\n" ); document.write( "48 = a + b + c.\r \n" ); document.write( "\n" ); document.write( "Now, we are told that the second side is 5 feet longer than the first. The third side is 3 feet longer than the first. \r \n" ); document.write( "\n" ); document.write( "Let a= the first side. Then let b = second side = a+5. Then let c = the third side = a+3\r \n" ); document.write( "\n" ); document.write( "Now given these values, let's write out the equation again.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "48 = a + (a + 5) + (a + 3). \r \n" ); document.write( "\n" ); document.write( "Now we simply solve for a. Once we find a, we will be able to find b and c.\r \n" ); document.write( "\n" ); document.write( "48 = a + (a + 5) + (a + 3). \r \n" ); document.write( "\n" ); document.write( "Combine like terms to simplify.\r \n" ); document.write( "\n" ); document.write( "48 = 3a + 8\r \n" ); document.write( "\n" ); document.write( "Subtract 8 from both sides to isolate a.\r \n" ); document.write( "\n" ); document.write( "40 = 3a\r \n" ); document.write( "\n" ); document.write( "Divide both sides by 3.\r \n" ); document.write( "\n" ); document.write( "a = 13.33 \r \n" ); document.write( "\n" ); document.write( "Now, to find the other sides. We know that a = 13.33, \n" ); document.write( " that means b = 13.33 + 5 = 18.33 and c = 13.33 + 3 = 16.33 \n" ); document.write( " \n" ); document.write( "Now let's add up all the values to see if they equal 48.\r \n" ); document.write( "\n" ); document.write( "13.33 + 18.33 + 16.33 = 47.99. When we round up it equals 48. \n" ); document.write( " |