Given:
Original side lengths are 3, 4, and 5.
Scale factor = 1.5.
To find:
The all of the side lengths of the newly created triangle.
Solution:
We need to multiply the side lengths with the scale factor to get the side lengths of the newly created triangle.
The original side lengths are 3, 4, 5 and scale factor is 1.5. So, side lengths of the newly created triangle are



So, the side lengths of the newly created triangle are 4.5, 6 and 7.5.
Therefore, the correct options are C, D and E.