Answer:
3:4 9:12
Step-by-step explanation:
Rewrite the ratios as fractions. 3:4 becomes 3/4, and 9:12 becomes 9/12, which simplifies to 3:4. Therefore A is a true proportion.
1,40
I have no clue
I'm in middle school I don't know
you can just type out like 30 degrees, 50 degrees, and 100 degrees or something like that