3,360
............................................................
They will have to share 2.5 pounds of rice
For question 9 - It is stating that AE is equal to 38. So the length of the entire line is 38. We then need to look at which figures are actually useful to us, which in this case is AC which is 10. Therefore the answer is as simple as 38-10, which gives us an answer of 28 for the other half of the line, notated as CE.
The sum of the three interior angles would be 180°
Hope this helped