1. 2) In a triangle with sides of lengths 3 and 6, which of the following is a possible value of the perimeter of the triangle? A.) 10 B.) 12 C.) 16 D.) 18 E.) 20 1)

3. 12/12/11 Chapter 4 - Review TWO TWO things to do Graphic Organizer

4. 1)Fold your paper in half vertically. 2)Cut 7 equal tabs on the left side Classifying Triangles Triangle Sum Theorem Exterior Angle Theorem Distance Formula Pythagorean Theorem Median / Centroid ∆ Inequality DefinitionExample w/Diagram

5. Definition Example w/Diagram

6. 1) ∆ JLM 2) ∆ JKL 3) ∆ JKL 4) ∆ JLM

7. x + 2x – 3 + 3x – 15 = 180 6x – 18 = 180 6x = 192 x = 33 12x = 54 + 78 12x = 132 x = 11

8. 3x = 15 or 5x – 10 = 15 x = 5 5x = 25 x = 5

9. 10² + 14² = c² 100 + 196 = c² 296 = c² 17.2 = c

10. 6² + 8² = c² 36 + 64 = c² 100 = c² 10 = c # 9 # 10 4² + 2² = c² 16 + 4 = c² 20 = c² 4.5 = c

11. c² = a² + b² ? 24² = 17² + 18² 576 < 613ACUTE

12. c² = a² + b² ? 13² = 6² + 9² 169 = 36 + 81 169 > 117 OBTUSE c² = a² + b² ? 20² = 12² + 14² 400 = 144 + 196 400 > 400 OBTUSE

13. 33 3 = 11 = DC 11 * 2 = DE = 22

14. ACBCAB

15. 31 ° 31 °+ 31 °=62° 180 °+ 62 °=118° 90 °- 44 °=46°

16. 5 + 8 > 18 NO 20 + 24 > 40 YES 7 + 7 > 14 NO 31 + 45 > 50 YES

24. 90⁰ X, because opp. side is 10 and 8 is smaller