Question

The triangle and the square shown have the same perimeter. Solve the equation 3x + 4x + 5x = 4(x + 2) to find the value of x. Then find the length of one side of the square. 3x 5x 4x x+2 x+2​

Answer 1

Explanation:

3x+4x+5x=4(x+2)

12x=4x+8

12x-4x=8

8x=8

8/8=x

1=x

x=1

now the length of one side of the square,

3x 5x 4x x+2 x+2

3x1=3 5x1=5 4x1=4 1+2=3 1+2=3

3+5+4+3+3=18

the length of one side of the square is 18 cm.