1.	A ______________ is a logical argument in which each statement is backed up by a statement that is accepted as true.
		A.	proof	B.	theorem
		C.	definition	D.	postulate
		Hint
	2.	Which of the following statements is not a postulate?
		A.	A plane contains at least three points not on the same line.
		B.	If two lines intersect, then their intersection is exactly one point.
		C.	Through any two points, there is exactly one line.
		D.	Points that lie of the same plane are said to be coplanar.
		Hint
	3.	In the figure, points A, B, and C lie in plane Z. Which of the following postulates can be used to show that A and B are collinear?
		A.	If two planes intersect, then their intersection is a line.
		B.	Through any two points, there is exactly one line.
		C.	Through any three points not on the same line, there is exactly one plane.
		D.	If two lines intersect, then their intersection is exactly one point.
		Hint
	4.	Determine the number of line segments that can be drawn connecting pairs of points shown.
		A.	8	B.	4
		C.	6	D.	10
		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.	7	B.	42
		C.	15	D.	21
		Hint