You can just use sine.
Sin(F) = opposite/hypotenuse = 28/40.
F =

(28/40)
Plug into your calculator.
44.4
Answer:
mean
Step-by-step explanation:
do you mean the equivalent fractions?
If so,The equivalent fractions of 4/5 are 8/10, 12/15, 16/20
I hope this is what you mean.
Answer:
I think it's 20
Step-by-step explanation:
10x4÷2 because vase times height,the divide by 1/2 which it 2 so answer is 20