1. Over Lesson 8–1 5-Minute Check 1 Find the geometric mean between 9 and 13. A.2 B.4 C. D.

2. Over Lesson 8–1 5-Minute Check 2 A. B. C. D. Find the geometric mean between

3. Over Lesson 8–1 5-Minute Check 3 Find the altitude a. A.4 B. C.6 D.

4. Over Lesson 8–1 5-Minute Check 4 Find x, y, and z to the nearest tenth.

5. Then/Now Review how to use the Pythagorean Theorem. Identify Pythagorean triples Determine types of triangles using the converse and inequalities of the Pythagorean Theorem. 8.2: Pythagorean Theorem

6. Concept

7. #1: Find the value of x.

8. #2: Find the value of x.

9. #3) Find the value of x. #4) Find the value of x.

10. Concept

11. #5: Determine whether 9, 12, and 15 can be the measures of the sides of a triangle. Then, determine if it is a right triangle

13. Group 1: 30, 40, 50 Group 2: 6, 12, 18 Group 3: 10, 11, 20 Group 5: 5, 12, 13 Group 6: 7, 14, 16

14. Concept

15. #10: Determine whether 10, 11, and 13 can be the measures of the sides of a triangle. If so, classify the triangle as acute, right, or obtuse. Justify your answer.

16. Example 4 A.yes, acute B.yes, obtuse C.yes, right D.not a triangle #11. Determine whether the set of numbers 7, 8, and 14 can be the measures of the sides of a triangle. If so, classify the triangle as acute, right, or obtuse. Justify your answer.

17. Example 4 A.yes, acute B.yes, obtuse C.yes, right D.not a triangle #12. Determine whether the set of numbers 14, 18, and 33 can be the measures of the sides of a triangle. If so, classify the triangle as acute, right, or obtuse. Justify your answer.

18. #13) Solve for x. #14) Solve for x.

19. Homework: p.552 #11-13, 24-28, 38-39