3.1 Lines and Angles

3-1 Lines and Angles

by Steve Dull

​Objective:

​

​

To identify relationships formed by two lines and a transversal

Not all lines and not all planes intersect.​

​

​Let's walk through a couple examples:

​

You try:

​New term: Transversal

​

​Pairs of the eight angles have special names as suggested by their positions:

​

Multiple Choice

Which pair of angles are alternate exterior angles?

• $$\angle1\$$  and  $$\angle7$$  

• $$\angle2$$  and  $$\angle6$$  

• $$\angle2$$  and  $$\angle4$$  

• $$\angle1$$  and  $$\angle5$$  

Multiple Choice

What type of angle pair are $$\angle3$$ and  $$\angle7$$  ?

• Vertical angles

• Alternate exterior angles

• Alternate interior angles

• Consecutive (same side) interior angles

Open Ended

Name a pair of alternate exterior angles in this image:

Multiple Select

Which pairs are Vertical Angles?

Select all that apply.

• $$\angle\ 1\ and\ \ \angle\ 2$$

• $$\angle\ 1\ \ and\ \ \ \angle\ 6$$

• $$\angle\ 2\ \ and\ \ \ \angle\ 3$$

• $$\angle\ 3\ and\ \ \angle\ 8$$

• $$\angle\ 4\ \ and\ \ \angle\ 7$$

Multiple Choice

Name the alternate interior angle to angle 3.

• 4
• 5
• 6
• 8