Which of the following statements
must be true? Select all that apply.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?