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CHAPTER2.9Y
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à 2.9èReview
äèPlease answer ê followïg questions about geometric
proçs.
â
èèèèèèèèèNot available ï ê Review Section
éS
èèèèèèèèèNot available ï ê Review Section
1
èèèèè Use ïductive reasonïg ë predict ê next number.
èèèèèèèèèèèè 7, 12, 17, 22, 27, _____
èèèèèèA) 37èèèè B) 32èèèè C) 29èèèè D) None
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
2
èèèèè Use ïductive reasonïg ë predict ê next number.
èèèèèèèèèèèè 0, 2, 6, 12, 20, _____
èèèèèèA) 30èèèè B) 28èèèè C) 32èèèè D) None
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
3è Suppose you are observïg ê ïtensity ç a street light as
you move away from it.èPredict ê next number.èèèèè
èèèèèèèèèDistanceè10èè 20èè30èè40èè50è
èèèèèèèèèIntensityè1èè1/4è 1/9è 1/16è___
èèèèèA) 1/36èèèè B) 1/25èèèè C) 1/27èèèè D) None
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
4èPlease prove ê followïg statement is true by deductive
proç or show that it is not universally true by counterexample.èèèèè
(See Problem 5 ï Section 2.2)
èèèèèè Theorem: If a·b = 1 å a·c = 1, ên b = cèèèèèèèèè
èèèèèèè
A) True by deductive proçèèB) Not universally true by counterexample
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
5èPlease prove ê followïg statement is true by deductive
proç or show that it is not universally true by counterexample.èèèèè
(See Axiom 20 ï ê Details ç Section 2.2)
èèèèèèèTheorem: If c < 0 å a < b, ên a·c < bcèèèèèèèèè
èèèèèèè
A) True by deductive proçèèB) Not universally true by counterexample
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
6
èèèèèè Write ê converse ç
èèèèèè If ╬A å ╬B are complementary, ên m╬A + m╬B = 90°è
èèèèA) If m╬A + m╬B ƒ 90°, ên ╬A å ╬B are not complementary
èèèèB) If m╬A + m╬B = 90°, ên ╬A å ╬B are complementaryèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
7
èèèèèè Write ê contrapositive ç
èèèèèè If ╬A is acute, ên ê supplement ç ╬A is obtuse.è
èèèA) If ê supplement ç ╬A is not obtuse, ên ╬A is not acute.
èèèB) If ╬A is not acute, ên ê supplement ç ╬A is not obtuse.èèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
8
èèèèèèèèèèè Write ê ïverse ç
èèèèèèèèèèè If ╬A ╧ ╬B, ên m╬A = m╬Bè
èèèèèèèèèè A) If m╬A = m╬B, ên ╬A ╧ ╬B
èèèèèèèèèè B) If m╬A ƒ m╬B, ên ╬A ╨ ╬B
èèèèèèèèèè C) If ╬A ╨ ╬B, ên m╬A ƒ m╬Bèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç C
9èèèèèèèèèèèè Justify ê followïg statement.
èèèèèèèèèèèèèèèèèPoïts A, B, å C are collïear.èèèèèèèèèèè
èèèèèèè
èèèèèèèèèèèèèèèèèè A) Defïition ç space
èèèèèèèèèèèèèèèèèè B) Defïition ç collïear
èèèèèèèèèèèèèèèèèè C) Defïition ç coplanar
@fig1101.BMP,35,40,147,74èèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
10èèèèèèèèèèè Justify ê followïg statement.
èèèèèèèèèèèèèèèèèè If AB = BC, ên ▒┤ ╧ ┤╖èèèèèèèèèè
èèèèèèèèèèèèèèèèèèA) Defïition ç midpoït
èèèèèèèèèèèèèèèèèèB) Defïition ç bisecër
èèèèèèèèèèèèèèèèèèC) Defïition ç congruence
@fig1101.BMP,35,40,147,74èèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç C
11èèèèèèèèèèèèJustify ê followïg statement.
èèèèèèèèèèèèèèè If m╬CEP = m╬PED, ên ╬CEP ╧ ╬PEDèèèèèèèèèè
èèèèèèèèèèèèèèèèA) Defïition ç congruent angles
èèèèèèèèèèèèèèèèB) Defïition ç angle bisecër
èèèèèèèèèèèèèèèèC) Defïition ç straight angle
@fig1602.BMP,35,40,147,74èèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
12èèèèèèèèèèèèJustify ê followïg statement.
èèèèèèèèèèèèèèèèèIf ╬CEP ╧ ╬PED, ên ║┴ is anèèèèèèèèèèè
èèèèèèèèèèèèèèèèèèè angle bisecër.
èèèèèèèèèèèèèèèèèA) Defïition ç congruent angles
èèèèèèèèèèèèèèèèèB) Defïition ç angle bisecër
@fig1602.BMP,35,40,147,74èèèè C) Defïition ç straight angleèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
13èèèèèèèèèèèèJustify ê followïg statement.
èèèèèèèèèèèèèèèèèIf ╣┴ bisects ▒┤, ên P is êèèèèèèèèèèè
èèèèèèèèèèèèèèèèèèèèmidpoït ç ▒┤
èèèèèèèèèèèèèèèèèA) Defïition ç adjacent angles
èèèèèèèèèèèèèèèèèB) (8)Segment addition axiom
@fig2502.BMP,35,40,147,74èèèè C) Defïition ç bisecërèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç C
14èèèèèèèèèèè Justify ê followïg statement.
èèèèèèèèèèèèèèèè If m╬APC = 180°, ên ╬APC is aèèèèèèèèèèè
èèèèèèèèèèèèèèèèèèèè straight angle
èèèèèèèèèèèèèèèèèA) Defïition ç adjacent angles
èèèèèèèèèèèèèèèèèB) Defïition ç straight angles
@fig2503.BMP,35,40,147,74èèèè C) (14)Right angles are congruentèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç B
15èèèèèèèèèèèèèJustify ê followïg statement.
èèèèèèèèèèèèèèèèèèIf ╬APB å ╬BPC form a lïearèèèèèèèèèèè
èèèèèèèèèèèèèèèèèèpair, ên êy are supplements
èèèèèèèèèèèèèèèèè A) Defïition ç lïear pair
èèèèèèèèèèèèèèèèè B) Defïition ç complementary angles
@fig2503.BMP,35,40,147,74èèèèèC) (15)Lïear pairs are supplementsèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç C
16èèèè Justify ê followïg statement.
èèèèèèèèIf ▒┤ ╧ ╖└ å ╖└ ╧ ╞╔, ên ▒┤ ╧ ╞╔.èèèèèèèèèèè
èèèèèèèèèèèèèèèèèèèèèèèè
èèèèèèèèèèA) (12)Angle addition axiom
èèèèèèèèèèB) (15)Lïear pairs are supplements
èèèèèèèèèèC) Transitive axiom ç equalityèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç C
17èPlease prove ê given statement is true or show that it isèèèèèèèèèèèèèèè
èèèèèènot universally true by counterexample.
èèèèèèèèèèèè
èè Aèè Pèè Bèèè Theorem: If ▒└ ╧ └┤, ên P is ê midpoïtèèèèèèèèèèèè
èè ⌐╓╓╓╓╓⌐╓╓╓╓╓⌐èèèèèè
èèèèèèèèèèèèèèèèèèèèèèèèèèèèèèèèèè
A) True by deductive proçèèB) Not universally true by counterexampleèèèèèèèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
18èPlease prove ê given statement is true or show that it isèèèèèèèèèèèèèèè
èèèèèèèèèèèèèèèè not universally true by counterexample.è
èèèèèèèèèèèèèèèèè (See Problem 5 ï Section 2.6)
èèèèèèèèèèèèèèèèè Theorem:If └┤ ╧ └╖, ên AP = AC - PBèèèèèèèèèèè
èèèèèèè
èèèèèèèèèèèèèèè A) True by deductive proçèèèèèèèèèèèèèèèèèè
@fig2604.BMP,35,40,147,74èèèB) Not universally true by counterexampleèèèèèèèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
19èPlease prove ê given statement is true or show that it isèèèèèèèèèèèèèèè
èèèèèèèèèèèèèèèè not universally true by counterexample.è
èèèèèèèèèèèèèèèèèè(See Problem 9 ï Section 2.6)
èèèèèèèèèèèèèèèèèèTheorem:If m╬BPC = 90°, ên ▒╖ ß ┤└èèèèèèèèèèè
èèèèèèè
èèèèèèèèèèèèèèè A) True by deductive proçèèèèèèèèèèèèèèèèèè
@fig2604.BMP,35,40,147,74èèèB) Not universally true by counterexampleèèèèèèèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
20èPlease prove ê given statement is true or show that it isèèèèèèèèèèèèèèè
èèèèèèèèèèèèèèèè not universally true by counterexample.è
èèèèèèèèèèèèèèèèè (See Problem 1 ï Section 2.7)
èèèèèèèèèèèèèèèèè Theorem:If ╬1 ╧ ╬3, ên ╬2 ╧ ╬4èèèèèèèèèèè
èèèèèèèèèèèèèèèèè (╬1 å ╬2, ╬3 å ╬4 are supplements)èèèèèèè
èèèèèèèèèèèèèèè A) True by deductive proçèèèèèèèèèèèèèèèèèè
@fig2702.BMP,35,40,147,74èèèB) Not universally true by counterexampleèèèèèèèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
21èPlease prove ê given statement is true or show that it isèèèèèèèèèèèèèèè
èèèèèèèèèèèèèèèè not universally true by counterexample.è
èèèèèèèèèèèèèèèèè (See Problem 3 ï Section 2.7)
èèèèèèèèèèèèèèèèè Theorem:If ╬1 ╧ ╬3, ên ╬2 ╧ ╬4èèèèèèèèèèè
èèèèèèèèèèèèèèèèè (╬1 å ╬2, ╬3 å ╬4 are complements)èèèèèèè
èèèèèèèèèèèèèèè A) True by deductive proçèèèèèèèèèèèèèèèèèè
@fig2704.BMP,35,40,147,74èèèB) Not universally true by counterexampleèèèèèèèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A
22èPlease prove ê given statement is true or show that it isèèèèèèèèèèèèèèè
èèèèèèèèèèèèèèèè not universally true by counterexample.è
èèèèèèèèèèèèèèèèèèè (See Problem 5 ï Section 2.7)
èèèèèèèèèèèèèèèèèèè Theorem:If ╬1 å ╬3 are verticalèèèèèèèèèèè
èèèèèèèèèèèèèèèèèèè angles, ên ╬1 ╧ ╬3èèèèèèè
èèèèèèèèèèèèèèè A) True by deductive proçèèèèèèèèèèèèèèèèèè
@fig2706.BMP,35,40,147,74èèèB) Not universally true by counterexampleèèèèèèèèèèèèèèèèèèèèèèèè
ü
èèèèèèèèèNot available ï ê Review Section
Ç A