Answer:
1:2
Explanation:
Triangle PQR has a vertical side of 1 and a horizontal side of 2.
so the ratio is vertical : horizontal is 1:2
Triangle STU has a vertical side of 3 and a horizontal side of 6.
so the ratio is vertical : horizontal is 3:6
which can be reduced by dividing both sides by 3
so the ratio is vertical : horizontal is 1:2