Describe where the angles are in this picture.

1

• Describe where the angles are in this picture.
• Search the classroom for objects that have
  angles. With a partner collect one item with an
  angle and return to your seat.
• Present your item and explain where the angles
  are in their object.

2
Objective

• Classify angles as
• right
• obtuse
• acute
• straight

3
Classifying Angles

• Acute angle measuring less than 90.
• Obtuse angle measuring more than 90 and less
  than 180.
• Right angle measuring 90.
• Straight angle measuring 180.

4
Identifying Angles

• Refer to your notes and identify the angle.
• Explain how you know.

Straight Angle
5
Identifying Angles

• Refer to your notes and identify the angle.
• Explain how you know.

Right Angle
6
Identifying Angles

• Refer to your notes and identify the angle.
• Explain how you know.

Acute Angle
7
Identifying Angles

• Refer to your notes and identify the angle.
• Explain how you know.

Obtuse Angle
8
Measuring Angles

• The angle of the hands on a clock is formed with
  one hand on the 12 and one hand on the 6.
• What is the measure of this angle?

• 180 degrees

9
Measuring Angles

• On a baseball field, the bases form angles. What
  is the measure of the angle that home plate,
  first base and second base make with each other?
  
• (First base being the vertex).

• 90 degrees

10
Objective

• Classify angles as
• right
• obtuse
• acute
• straight