math
posted by Kylie on .
the perimeter of an isosceles triangle is 21 meters. the length of one side is 3 meters longer than the length of the other two sides. find the length of each side.

sides : x, x , 212x
"the length of one side is 3 meters longer than the length of the other two sides"
This is ambiguous
1st interpretation:
> 212x = x+x+3
4x = 18
x = 4.5
sides are 4.5, 4.5, and 12
This is not a possible triangle.
To have a triangle the longest side must be less than the sum of the other two sides,
2nd interpretation:
> 212x = x+3
3x = 18
x = 6
sides are 6, 6, and 9
This one works.