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# 09 21-11 wk 4-3 triangle basics

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### Transcript

• 1. 9/21/11Wednesday
EQ: How do I identify and describe polygons?
I can classify triangles based on sides and angles.
9/17/2011
1
Bitsy Griffin 4-3 Objective 3
• 2. Quick Review:
Polygon prefixes
9/17/2011
2
Bitsy Griffin 4-3 Objective 3
• 3. Angles:
Two rays or line segments come together and form an
Angle!
9/17/2011
3
Bitsy Griffin 4-3 Objective 3
• 4. Angles:
Right
Exactly 90o
9/17/2011
4
Bitsy Griffin 4-3 Objective 3
• 5. Angles:
Obtuse
Greater than 90o
9/17/2011
5
Bitsy Griffin 4-3 Objective 3
• 6. Angles:
Acute
Less than 90o
9/17/2011
6
Bitsy Griffin 4-3 Objective 3
• 7. Angles:
Straight
Exactly 180o
9/17/2011
7
Bitsy Griffin 4-3 Objective 3
• 8. Scalene
No sides the same
No angles the same.
9/17/2011
8
Bitsy Griffin 4-3 Objective 3
• 9. Scalene
9/17/2011
9
Bitsy Griffin 4-3 Objective 3
• 10. Isosceles:
2 sides the same
2 angles the same.
9/17/2011
10
Bitsy Griffin 4-3 Objective 3
• 11. Isosceles:
9/17/2011
11
Bitsy Griffin 4-3 Objective 3
• 12. Equilateral:
3 sides the same
3 angles the same.
9/17/2011
12
Bitsy Griffin 4-3 Objective 3
• 13. Triangle angles
A triangle’s angles always add up to 180o
9/17/2011
13
Bitsy Griffin 4-3 Objective 3
• 14. Equilateral:
9/17/2011
14
Bitsy Griffin 4-3 Objective 3
• 15. EQ: How do I identify and describe polygons?
I can classify triangles based on sides and angles.
9/17/2011
15
Bitsy Griffin 4-3 Objective 3
• 16. Assessment
Identify angle types
Identify triangle types
9/17/2011
16
Bitsy Griffin 4-3 Objective 3