1.	A ______________ is a logical argument in which each statement is backed up by a statement that is accepted as true.
		A.	postulate	B.	proof
		C.	theorem	D.	definition
		Hint
	2.	Which of the following is not one of the five essential parts needed to construct a good proof?
		A.	State the theorem to be proved.
		B.	List the given information.
		C.	If possible, draw a diagram to illustrate the given information.
		D.	Assume what you are trying to prove is true.
		Hint
	3.	Which of the following statements is not a postulate?
		A.	Points that lie of the same plane are said to be coplanar.
		B.	If two lines intersect, then their intersection is exactly one point.
		C.	Through any two points, there is exactly one line.
		D.	A plane contains at least three points not on the same line.
		Hint
	4.	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.	Through any three points not on the same line, there is exactly one plane.
		B.	If two planes intersect, then their intersection is a line.
		C.	Through any two points, there is exactly one line.
		D.	If two lines intersect, then their intersection is exactly one point.
		Hint
	5.	If and lie in plane P. Which of the following postulates can be used to show that lies in plane P?
		A.	If two planes intersect, then their intersection is a line.
		B.	Through any two points, there is exactly one line.
		C.	If two points lie in a plane, then the entire line containing those points lies in that plane.
		D.	A plane contains at least three points not on the same line.
		Hint