math hw help

Ok i need some help with this math problem. anyone know how to do this?>

One side of a triangle is half the longest side. The third side is 10 meters less than the longest side. The perimeter is 45 meters. Find all three sides

Re: math hw help

if its a right triangle use pythagorean theory. a2+b2+c2. c2 is the longest side.

but if its elem math, the student would have to use the "guess and check" strategy. i would use a table to organize the guesses.

Re: math hw help

I think it is 22 , 11, and 12 triangle.

Half of 22 is 11 and 10 less than 22 is 12

I did guess and check but I am sure there is some algebraic way to solve it too.


maybe n + n/2 + n-10 = 45

Message edited 3/5/2011 11:26:15 AM.

Re: math hw help

Re: math hw help

Thanks everone your all such a great help!!

Message edited 3/5/2011 2:14:14 PM.