Question

the length of the side of a triangle 6cm. the second side is twice the third side.if perimeter of the triangle is 18cm, finde the sides of triangle

Answer 1

let be the third side is "x"

then second side = 2x
.



the perimeter of the triangle




x+2x+6 = 18


6+3x = 18


3(2+x) = 18



2+x = 6


x= 6-2


x = 4



the sides of triangle ,


x = 4


2x = 2×4. = 8

Answer 2

Let the third side be x
Therefore the length of the second side is 2x
Perimeter of the triangle = 6+2x+x
18 = 6 + 3x
3x = 18 - 6
3x = 12
X = 12/3
X = 4
Therefore the length of the third side is 4 and the length of the second side is 2*4= 8