How do Mr. Frank's and Mr. Van Daan's reactions to Dussel's arrival differ?

right angles are formed by perpendicular lines. if the lines would extend, to make two intersecting lines, they would form four right angles.

the answer should be

the simple past tense of strive.

hope this !

two factors or characteristics of a chapter that might make it difficult to read would be words i don't understand, or if i don't fully understand what's going on in the chapter. strategies i can use to get through the difficult material would be a dictionary, and re-reading previous chapters to get a better grasp of what the author is trying to say.