The first day, they drove 300 miles in 6 hours so divide 6 by 300. 300 divided by 6 equals fifty. On the third day, they drove half the amount of time, so it would be half the amount of miles because they drove the same speed throughout the trip.
The triangle will still be similar to the original triangle. Those transformations altered the position and scale of the triangle, but the angle measures are still the same.
