True
It won’t be a Prefect Triangle but it still is one
(sorry my drawing is bad)
Y should also be halved.
For example, if x=4 and y=2, x=2y.
If x is halved for x=2, you get 2=2y, or y=1, which is still one half of x, so the proportion remains the same.
The equation would be h=1m+42 and the answer is 78 I think