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- 1. Classifying Triangles<br />Mary S. Marks<br />
- 2. Objective<br /><ul><li>Today we will classify triangles by their sides and their angles.
- 3. Given two angles in a triangle, we will find the third angle. </li></li></ul><li>What are triangles?<br /><ul><li>Tell me what you know about triangles.</li></ul>(Note to teacher: Ask students what they know about triangles. Students should come up three sides, three angles, three vertices.)<br />
- 4. Classifying Triangles by their Sides<br /><ul><li>Equilateral Triangles - all sides are congruent
- 5. Isosceles Triangles - two sides are congruent
- 6. Scalene Triangles - no sides are congruent</li></li></ul><li>Classifying Triangles by their Angles<br /><ul><li>Acute Triangles - have three acute angles
- 7. Obtuse Triangles - have one obtuse angle
- 8. Right Triangles - have one right angle</li></li></ul><li>
- 9. Examples of triangles<br />
- 10. Examples of triangles<br />
- 11. Examples of triangles<br />
- 12. Examples of triangles<br />
- 13. Examples of triangles<br />
- 14. Examples of triangles<br />
- 15. Examples of triangles<br />
- 16. Examples of triangles<br />
- 17. Examples of triangles<br />
- 18. Examples of triangles<br />
- 19. Examples of triangles<br />
- 20. Examples of triangles<br />
- 21. Examples of triangles<br />
- 22. Examples of triangles<br />
- 23. Examples of triangles<br />
- 24. Examples of triangles<br />
- 25. Sum of the measures of the <br />angles in a triangle<br /><ul><li>What type of angle do the angles in the triangle form?
- 26. How many degrees does this type of angle have?
- 27. How many degrees does this type of angle have?</li></li></ul><li>Finding the missing angle<br /><ul><li>Two angles are given, find the measurement of the third angle</li></ul>?<br />?<br />?<br />
- 28. Finding the missing angle<br /><ul><li>Two angles are given, find the measurement of the third angle</li></ul>?<br />?<br />
- 29. Finding the missing angle<br /><ul><li>Two angles are given, find the measurement of the third angle</li></ul>?<br />?<br />
- 30. Finding the missing angle<br /><ul><li>Two angles are given, find the measurement of the third angle</li></ul>?<br />?<br />
- 31. What is a triangle?<br />Equilateral<br />Isosceles<br />Right<br />
- 32. Triangles in the Real World<br />

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