What's number 19? ? and how did u set it up?

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups

How do you write a paragraph proof to prove that the corresponding angles shown are congruent

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great