Answer:
The segment opposite to angle D is CF.
Step-by-step explanation:
To find what angle is opposite to a side. All you just have to do is see which segment doesn't touch that angle. We see that angle D does not touch CF, so angle D must be opposite to CF.
Multiply total students by the percentage:
600 x 80% = 600 x 0.80 = 480
480 students want more field trips.
3.5+4.6+2.5 = 10.6