1. A ______________ is a logical argument in which each statement is backed up by a statement that is accepted as true. A. proof B. postulate C. definition D. theorem Hint 2. Which of the following is not one of the five essential parts needed to construct a good proof? A. List the given information. B. Assume what you are trying to prove is true. C. State the theorem to be proved. D. If possible, draw a diagram to illustrate the given information. Hint 3. A _________ is a statement that describes a fundamental relationship between the basic terms of geometry and is accepted as true. A. postulate B. definition C. proof D. theorem Hint 4. Determine the number of line segments that can be drawn connecting pairs of points shown. A. 4 B. 6 C. 10 D. 8 Hint 5. A group of 7 people get together for a meeting. Before the meeting starts, they each shake hands with every person at the meeting. If a person only shakes hands with another person once, how many handshakes were there before the meeting began? A. 42 B. 21 C. 7 D. 15 Hint