Summer vacation learning and practical mathematics (Grade 8) reference answer (1)1.b10.136 2.b3.d4.b5.c6.c7.408. Parallel 9. a = c > b/kloc-0. (.3; 4; Two straight lines are parallel and have the same angle. 13. Omit (2) is parallel because Omit ∠D (3) Omit 14. ( 1)∠b+∠d =∠e(2)∠e+∠g =∠b+∠f+(。 Slightly 8.415.slightly 9. Parallel 10. 9 cm or 13 cm 13. Omit 16. (1) 15 (2) 20 (3) (4 reasons (3) 1.20 2.cm 3. 8 4.4.8 5.36 6.3 7.D 8。 C 14。 Arrive at the same time, 9. b10. b1.1000000001.1000000006 The reason is omitted 15. (1) City A is affected (2) 8 hours 13.0.5m (4) 1. C 1 1。 16.cm2.d3.b4.a13.omitted 5.c6.a7.c8.b (2) 6ab9.3010.612.omitted14. (1) Sampling survey (2) Census 6.8.07.17 9.31; 3 1 13. Omitted 1 1. The champion, runner-up and runner-up are Li Yang, Lin Fei and Li Cheng (6)1.b8.slightly 2.c9.slightly 3.c4.50; 105.0. 1576m 26. 1237。 Omit (7)1.b2.a3.c4.a5.c9.46.b7.d8. (1) 65438. Omit (3) ≥ (4) < (5) < 14. -2，- 1 15. 16 . b < 0 10 . a < AB 2 < AB(8) 1。 16 4.C 1 1。 x-2 1 1。 Omit 12. ( 1) y = 2x+4 (2) 0.5 (3) x