You can use the cosine rule for this - you might have to change some of the letters around for it to make sense though. Hope this helps!
9 rolls* (3 cups of flour/ 27 dinner rolls)= 1 cup of flour.
1 cup of flour is needed to make 9 rolls~
Super blurry can you resubmit or type out the question
C. The three angles on the bottom are all exactly the same.