and consecutive interior angles. 1.pdfsection 3.1 (special angles formed by parallel lines cut by a...

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Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 1 September 19, 2011 Objective: I can identify parallel lines, skew lines, transversals, alternate interior angles, alternate exterior angles, corresponding angles and consecutive interior angles.

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Page 1: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

1

September 19, 2011

Objective:I can identify parallel lines, skew lines, transversals, alternate interior angles, alternate exterior angles, corresponding angles and consecutive interior angles.

Page 2: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

2

September 19, 2011

A

B

C

D

E

G

F

H

Parallel Lines­ Two lines in the same plane that do not intersect.

Skew Lines ­ Two lines not in the same plane that do not intersect.

Parallel Skew

Page 3: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

3

September 19, 2011

Vocabulary

Transversal: a line that intersects two parallel lines

Interior Angles: Formed on the inside of two lines cut by a transversal

Exterior Angles: Formed on the outside of two lines cut by a transversal.

Page 4: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

4

September 19, 2011

M

N

T

S

R

Q

P

O

Identify interior, exterior, and transversal

Interior

Exterior

Transversal

Interior

Interior

Interior

Interior

ExteriorExterior

ExteriorExterior

Transversal

Page 5: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

5

September 19, 2011

1 Which of the following statements is false?

A A transversal is a line.

B A transversal must intersect at least two lines.

CThe lines the transversal intersects must be parallel to each other.

DThe lines a transversal intersects can be perpendicular to each other.

Page 6: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

6

September 19, 2011

Vocabulary

Alternate interior angles: interior angles on opposite sides of the transversal-not adjacent

Alternate exterior angles: exterior angles on opposite sides of the transversal-not adjacent

Corresponding Angles: One interior and one exterior angle formed on the same side of the transversal

Consecutive Interior angles: interior angles on same side of the transversal.

Page 7: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

7

September 19, 2011

More with Vertical Angles

Example One

Example Two

Example Three

Example Four

Page 8: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

8

September 19, 2011

2 Form a pair of vertical angles using W.  Which angle completes the pair?

A XB CC ZD Y

A BC D

X YW Z

Line 1

Line 2

Page 9: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

9

September 19, 2011

More with Alternate Interior AnglesExample One

Example Two

Page 10: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

10

September 19, 2011

3 Which angle forms a pair of alternate interiors with <C?  

A XB DC YD W

A BC D

X YW Z

Line 1

Line 2

Page 11: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

11

September 19, 2011

More with Same Side (Consecutive Interior) Angles

Example One

Example Two

Page 12: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

12

September 19, 2011

4 Which angle forms a pair of consecutive interior angles with <C?

A XB DC WD Y

A BC D

X YW Z

Line 1

Line 2

Page 13: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

13

September 19, 2011

More with Alternate Exterior AnglesExample One

Example Two

Page 14: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

14

September 19, 2011

5 Which angle forms a pair of Alternate Exterior Angles with <A?

A XB BC WD Z

A BC D

X YW Z

Line 1

Line 2

Page 15: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

15

September 19, 2011

More with Corresponding AnglesExample One

Example Two

Example Three

Example Four

Page 16: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

16

September 19, 2011

6 Which angle forms a pair of corresponding angles with <A?

A XB BC WD Z

A BC D

X YW Z

Line 1

Line 2

Page 17: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

17

September 19, 2011

M

N

T

S

R

Q

P

O

Label alternate interior, alternate exterior, corresponding , vertical, supplementary angles

corresponding

alternate interior

alternate exterior verticalsupplementary

corresponding

corresponding

alternate exterior

alternate exterior

alternate interior

alternate interior

supplementary

supplementary

verticalvertical

Page 18: and consecutive interior angles. 1.pdfSection 3.1 (Special angles formed by parallel lines cut by a transversal.notebook 5 September 19, 2011 1Which of the following statements is

Section 3.1 (Special angles formed by parallel lines cut by a transversal.notebook

18

September 19, 2011