Reasons a. b. c. Vertical Angles- d.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Related questions
Question
M
Given: PM bisects ZLPN
P
1
Prove: 2 41
Statements
Reasons
a. PM bisects LPN
b. 22 23
a.
b.
c. Vertical Angles Are a
с.
d. 22 21
d.
GEOMETRY
Name
Notes Section 2.6 Day 2
Proofs With Definitions
Today we will be looking at proofs which require definitions.
Remember, definitions are always biconditional – they are true both ways!
Definition of a Right Angle
IF and angle's measure is 90°
THEN it is a right angle
OR
IF an angle is a right angle
THEN its measure is 90°
Definition of Complementary Angles
Definition of Supplementary Angles
IF two angles sum to 90
THEN they are complementary
IF two angles sum to 180°
THEN they are supplementary
OR
OR
IF two angles are supplementary
IF two angles are complementary
THEN they sum to 90°
THEN they sum to 180°
1. Given: ZABE is a right angle.
Prove: 24 is complementary to 42
2. Given: 2 is supplementary to 23
Prove: 45 is supplementary to 43
D
A
B
2
3
4
E
Statements
Reasons
Statements
Reasons
1. ZABE is a right
angle
2. MLABE = 90°
1.
1.
1.
2.
2.
2.
3. Angle Addition
Postulate
3.
3.
3.
4.
4.
4.
4.
5. Vertical Angles
Theorem
5.
5.
5.
6.
6.
6.
6.
7. Substitution Property
of Equality
8.
7.
8. 4 is
complementary to 2
Transcribed Image Text:M Given: PM bisects ZLPN P 1 Prove: 2 41 Statements Reasons a. PM bisects LPN b. 22 23 a. b. c. Vertical Angles Are a с. d. 22 21 d. GEOMETRY Name Notes Section 2.6 Day 2 Proofs With Definitions Today we will be looking at proofs which require definitions. Remember, definitions are always biconditional – they are true both ways! Definition of a Right Angle IF and angle's measure is 90° THEN it is a right angle OR IF an angle is a right angle THEN its measure is 90° Definition of Complementary Angles Definition of Supplementary Angles IF two angles sum to 90 THEN they are complementary IF two angles sum to 180° THEN they are supplementary OR OR IF two angles are supplementary IF two angles are complementary THEN they sum to 90° THEN they sum to 180° 1. Given: ZABE is a right angle. Prove: 24 is complementary to 42 2. Given: 2 is supplementary to 23 Prove: 45 is supplementary to 43 D A B 2 3 4 E Statements Reasons Statements Reasons 1. ZABE is a right angle 2. MLABE = 90° 1. 1. 1. 2. 2. 2. 3. Angle Addition Postulate 3. 3. 3. 4. 4. 4. 4. 5. Vertical Angles Theorem 5. 5. 5. 6. 6. 6. 6. 7. Substitution Property of Equality 8. 7. 8. 4 is complementary to 2
2.6 Day 1 Homework: I can prove statements about segments and angles.
Given: ZLMO S ENMP
Prove: LMPS ZNMO
Statements
Reasons
a.
b. MZLMO = MZNMP
b.
c. MZLMO=mzLMP+m<PMO
C.
MZNMP=mZ NMO +mzPMO
d. mzLMP+MLPMO=m2 NMO +M<PMO
e. mzLMP=mzNMO
f. ZLMP S ZNMO
f.
Given: AC BD
Prove: AB CD
Statements
Reasons
a. AC BD
b. AC = BD
a.
b.
c. AB + BC = AC
C.
d. BC + =
d. Segment Addition Postulate
e. AB + BC = BC + CD
e
f. Subtraction Property
g. Definition of Congruent Segments
f.
g.
Given: B is the midpoint of AC
B
Prove: AB = AC
Statements
Reasons
a. Bis the midpoint of AC
a.
b. AB = BC
b.
с. АВ + ВС AC
с.
d. AB + AB = AC
d.
e. 2AB = AC
e.
f. AB = AC
f.
Transcribed Image Text:2.6 Day 1 Homework: I can prove statements about segments and angles. Given: ZLMO S ENMP Prove: LMPS ZNMO Statements Reasons a. b. MZLMO = MZNMP b. c. MZLMO=mzLMP+m<PMO C. MZNMP=mZ NMO +mzPMO d. mzLMP+MLPMO=m2 NMO +M<PMO e. mzLMP=mzNMO f. ZLMP S ZNMO f. Given: AC BD Prove: AB CD Statements Reasons a. AC BD b. AC = BD a. b. c. AB + BC = AC C. d. BC + = d. Segment Addition Postulate e. AB + BC = BC + CD e f. Subtraction Property g. Definition of Congruent Segments f. g. Given: B is the midpoint of AC B Prove: AB = AC Statements Reasons a. Bis the midpoint of AC a. b. AB = BC b. с. АВ + ВС AC с. d. AB + AB = AC d. e. 2AB = AC e. f. AB = AC f.
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