Question

the lenght of a side of a triangle is 6 cm. the second side is twice the third side . if the perimeter of the triangle is 18 cm, find the side of the triangle.

Answer 1

↑ Here is your answer ↓ _____________________________________________________________ _____________________________________________________________

Let the other sides be 'x' and '2x'

Given that

$x+2x+6 = 18$

$3x+6 = 18$

$3x=12$

$x=12/3$

$x=4$

So, other sides are

$x=4$

$2x = 8$

Answer 2

Let the 3rd side be x cm
Then, the 2nd side is 2x cm
The 1st side measures 6 cm. [given]

BTP,
x+2x+6=18 [perimeter of triangle is equal to the sum of all the three sides ]
=>3x+6=18
=>3x=12
=>x=4

3rd side measures 4 cm, 2nd side measures (2×4) =8 cm and the first side is 6cm