Who am I

1
Who am I????

• I am the union of two rays with a common
  endpoint.
• WHO AM I?

2
Who am I????

• I am the union of two rays with a common
  endpoint.
• WHO AM I?

3
Knowing all the angles

• What should you know about
• ANGLES?

4
I can be three dimensional !!!

• Can you draw me ?
• When Im two dimensional?
• When Im three
• dimensional?

5
Types of angles

• Right angles - angles with a measure of 90
  degrees
• Acute angles - angles with a measure less than 90
  degrees
• Obtuse angles - angles with a measure more than
  90 degrees but less than 180

6
What parts does an angle have?

• Left side
• which is a ray

• Right side
• which is a ray

7
Do I have other parts?

• I have a vertex
• I have an interior
• I have an exterior
• YES DEFINITELY

8
Can you guess how far my parts extend?

• To the ends of the earth and back!!!
• Are you excited yet?
• What do I have to do to excite you??

9
What are opposite rays?

• They form a straight line.
• They have the same endpoint
• They go in opposite directions
• They measure 180 degrees

• What are we?
• Need another hint?
• We are the sides of an angle.

10
What type of angle am I?

• Some angles are three dimensional
• Like the angle formed by the wall and the door
• Do you know what I am called?
• A dihedral angle

11
How am I measured?

• In degrees
• In degrees and minutes
• In degrees, minutes and seconds

A protractor
12
How do degrees, minutes and seconds compare?
One degree 60 minutes 3600 seconds