1. 5th Grade Academic Vocabulary Triangles

2. Triangles can be classified by size of the angle or by the length of the sides. Let’s try some covered words with names of triangles.

3. A triangle in which all sides are the same length is called.

4. A triangle in which all sides are the same length is called e .

5. A triangle in which all sides are the same length is called an equilateral .

6. A triangle in which two sides are the same is called .

7. A triangle in which two sides are the same is called i .

8. A triangle in which two sides are the same is called isosceles .

9. A triangle in which all sides are not equal is called .

10. A triangle in which all sides are not equal is called s .

11. A triangle in which all sides are not equal is called scalene.

12. A triangle whose angle measures 90° is called a ______ triangle.

13. A triangle whose angle measures 90° is called a r triangle.

14. A triangle whose angle measures 90° is called a right triangle.

15. A triangle who largest angle measures more that 90° and less than 180° is called an _______ triangle.

16. A triangle who largest angle measures more that 90° and less than 180° is called an o triangle.

17. A triangle who largest angle measures more that 90° and less than 180° is called an obtuse triangle.

18. A triangle who largest angle measures less than 90° is called an ______ triangle.

19. A triangle who largest angle measures less than 90° is called an a triangle.

20. A triangle who largest angle measures less than 90° is called an acute triangle.

21. Let’s review our words. Watch carefully because they will flash on the screen for just a moment. We will clap as we spell the word.

22. Equilateral

23. Isosceles

24. Scalene

25. Right

26. Obtuse

27. Acute

28. GREAT JOB!