1.	A ______________ is a logical argument in which each statement is backed up by a statement that is accepted as true.
		A.	postulate	B.	definition
		C.	proof	D.	theorem
		Hint
	2.	Which of the following is not one of the five essential parts needed to construct a good proof?
		A.	Develop a system of inductive reasoning.
		B.	State the theorem to be proved.
		C.	List the given information.
		D.	If possible, draw a diagram to illustrate the given information.
		Hint
	3.	What three things are accepted as true without verification or proof?
		A.	conclusions, hypotheses, and postulates	B.	definitions, theorems, and postulates
		C.	definitions, postulates, and undefined terms.	D.	theorems, postulates, and undefined terms
		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 two points, there is exactly one line.
		B.	If two lines intersect, then their intersection is exactly one point.
		C.	If two planes intersect, then their intersection is a line.
		D.	Through any three points not on the same line, there is exactly one plane.
		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.	A plane contains at least three points not on the same line.
		D.	If two points lie in a plane, then the entire line containing those points lies in that plane.
		Hint