Need Help with this problem please.
1. The perimeter of a triangle is 104 feet. The ratio of the three sides is 5:9:12. Find the length
of each side of the triangle.

Question

Need Help with this problem please.
1. The perimeter of a triangle is 104 feet.  The ratio of the three sides is 5:9:12.  Find the length
 of each side of the triangle.

mathmale · Answer

If the ratio of the 3 sides is 5:9:12, add together those three lengths (obtaining SUM) and then form three fractions:

5/SUM, 9/SUM,12/SUM

(Note:  if you add these up, the result will be 1.)

Then the length of the shortest side of the given triange is (5/SUM)*104 ft.  And so on.

danjs · Answer

sides   5x, 9x, 12x

perimeter = 104 = 5x + 9x + 12x

104 = 26x
x = 4

sides 5*4,  9*4,  12*4

danjs · Answer

so  20, 36, 48

similar, i just put the common factor x in to make that ratio for the sides

apschoollife · Answer

Thank you both so much, you were a lot of help :) I understand it now. Thanks.

mathmale · Answer

:)