1. M. Syafaur Rahmat Solekhah Elok Nur Afiyati Desinta Yosopranata Devi Iriyani

2. Kelompok 1 Halaman 318 No. 15 When a photograph is taken, the image formed on the film is similar to the object being photographed. Similar triangle help to explain this. If and are parallel, prove that △LAB and △LA’B’ are similar.

3. Answer : STATEMENTREASON 1. 1. Theorem 4-9 Vertical Angles Theorem (If two lines intersect, the vertical angles are congruent) 2. 2. Sudut dalam berseberangan 3. 3. Sudut dalam berseberangan 4. △LAB ̴ △LA’B’ 4. AAA Similarity

4. Kelompok 2 Halaman 321 No. 30 Given : Prove : △AFE ̴ △BDE

5. Answer : StatementsReasons 1.1. Given 2.2. Theorem 6-4 3. 3. Similar triangle have equal corresponding angle 4.4. Berimpit 5.5. AAA similarity postulate ~

6. Kelompok 3 Hal 320 28) Given: Prove : a. b.

7. Answer : 28) StatementsReasons 1.1. Given 2. 2. Similar triangle have equal corresponding angle 3.3. Theorem 6.4 4. 4. Similar triangle have equal corresponding angle 5.5.Sudut dalam bersebrangan 6.6. Sudut dalam bersebrangan 7. ~7. AAA Similarity postulate 8.8. Restatement 7 9.9. Statement 8

8. Kelompok 5 Hal 315 12) The lengths of the side of a pentagon are 6,8,9,12, and 15. if a similar pentagon has a longest side of 4, find the lengths of the remaining sides.

9. Answer :

10. Jadi nilai sisi yang lainnya 1.6, 2.13, 2.4, 3.2 dan 4

11. Kelompok 6 Hal : 315 14)Construct a quadrilateral similar to ABCD, whose shortest side has length 9.

12. Answer :

13. Kelompok 7 Hal : 325 23) Supppose AFDB is a rectangle and. Show that the are of AFDB=.

14. Answer : 23) In In The area of AFDB=BD.DF =