Activity 2: Filled Me Up! a. Fill in the blanks with the correct term/s to complete the statements. 1. The part of a line that has one endpoint and can be extended infinitely in one direction is called Let's Find Out: What are Terms Involved in the Subsets of a Line? 2. A line segment consists of endpoints b. Write the answer in your answer sheet. Let's Use These Materials: answer sheet and ballpen Let's Do It This Way:​