Answer:
The line of reflection must be x=5
Step-by-step explanation:
Here, C = (4, 2) & C' = (6, 2)
And the reflection here is across y-axis on x-axis.
The value of y is not changing with reflection, so the line of reflection will be:
scalene acute
Perimeter = 140
Side 1 = x
Side 2 = 2x
Side 3 = 3x - 10
x + 2x + 3x - 10 = 140
6x - 10 = 140
6x = 150
x = 25
Side 1 = 25 cm
Side 2 = 50 cm
Side 3 = 65 cm
Hope this helps!! :)