Respuesta :
The length of first side is 5 feet, the length of second side is 7 feet, the length of third side is 3 feet.
What is perimeter?
The perimeter is the sum of measurement of all sides of a triangle. It is done by a ruler.
How to calculate perimeter?
let the second side be x
according to question first side will be (x-2) feet and the third side will be (x-4) feet.
We know that the perimeter is equal to the sum of all sides of a triangle.
so
x+x-2+x-4=15
3x=6=15
3x=21
x=7
The length of first side=7-2=5 feet
The length of second side=7 feet
The length of third side=3 feet
Hence the sides of the triangle is 5 feet, 7 feet, and 3 feet.
Learn more about perimeter at https://brainly.com/question/19819849
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