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packa

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Posts: 1210

Post: #108

Я наверное туплю очень сильно, но никак не могу решить...

Image: ef1ebef34d48t.jpg

В Треугольнике с вершинами A B C (координаты на рисунке) вычислить длину биссектрисы AD.

Часть решения - угол САО я нашел быстро - 90 градусов если не ошибся.
АС(-8,6) АВ(3,4)
по формуле cosCAO= (-8*3)+(6*4)\sqrt(64+36)+sqrt(9+16)=0 => угол 90.
Ну и углы DAB и CAD = 45 градусов.

Все, дальше решить решительно не получается.

подпись была удалена администрацией
просьба не использовать картинки с сайта heroeslibrary.net, так как на них ругается Chrome

(This post was last modified: 08.10.2012 23:44 by packa.)

08.10.2012 23:34

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Hello from school! - packa - 28.09.2010, 14:57

RE: Школоло - Berserker - 28.09.2010, 15:13

RE: Школоло - Sav - 28.09.2010, 15:43

RE: Школоло - Berserker - 28.09.2010, 16:10

RE: Hello from school! - packa - 28.09.2010, 17:09

RE: Hello from school! - Sav - 28.09.2010, 21:42

RE: Hello from school! - packa - 28.09.2010, 21:56

RE: Hello from school! - Sav - 28.09.2010, 22:05

RE: Hello from school! - packa - 28.09.2010, 22:52

RE: Hello from school! - Sav - 28.09.2010, 23:09

RE: Hello from school! - packa - 29.09.2010, 00:57

RE: Hello from school! - Flashback - 29.09.2010, 01:15

RE: Hello from school! - packa - 29.09.2010, 13:35

RE: Hello from school! - packa - 24.02.2011, 23:53

RE: Hello from school! - Berserker - 25.02.2011, 02:18

RE: Hello from school! - izrukvruki - 25.02.2011, 13:56

RE: Hello from school! - packa - 25.02.2011, 19:08

RE: Hello from school! - Sav - 25.02.2011, 19:25

RE: Hello from school! - gamecreator - 25.02.2011, 21:38

RE: Hello from school! - Sav - 25.02.2011, 21:42

RE: Hello from school! - FCst1 - 26.02.2011, 01:53

RE: Hello from school! - etoprostoya - 26.02.2011, 02:58

RE: Hello from school! - Efrit - 26.02.2011, 15:10

RE: Hello from school! - gamecreator - 27.02.2011, 23:35

RE: Hello from school! - Efrit - 28.02.2011, 13:12

RE: Hello from school! - gamecreator - 28.02.2011, 21:21

RE: Hello from school! - packa - 28.02.2011, 21:36

RE: Hello from school! - Efrit - 28.02.2011, 21:59

RE: Hello from school! - etoprostoya - 28.02.2011, 23:29

RE: Hello from school! - Corwin - 28.02.2011, 23:53

RE: Hello from school! - gamecreator - 01.03.2011, 00:12

RE: Hello from school! - packa - 10.04.2011, 18:24

RE: Hello from school! - packa - 10.04.2011, 18:41

RE: Hello from school! - Tent - 10.04.2011, 19:02

RE: Hello from school! - packa - 10.04.2011, 22:21

RE: Hello from school! - Tent - 19.05.2011, 09:45

RE: Hello from school! - Efrit - 19.05.2011, 09:58

RE: Hello from school! - Sav - 19.05.2011, 22:04

RE: Hello from school! - gamecreator - 19.05.2011, 22:06

RE: Hello from school! - packa - 19.05.2011, 23:04

RE: Hello from school! - Tent - 20.05.2011, 18:37

RE: Hello from school! - gamecreator - 20.05.2011, 20:01

RE: Hello from school! - Efrit - 20.05.2011, 20:53

RE: Hello from school! - Tent - 21.05.2011, 03:34

RE: Hello from school! - gamecreator - 21.05.2011, 11:33

RE: Hello from school! - Tent - 21.05.2011, 12:49

RE: Hello from school! - gamecreator - 21.05.2011, 17:07

RE: Hello from school! - Tent - 22.05.2011, 13:46

RE: Hello from school! - gamecreator - 22.05.2011, 14:41

RE: Hello from school! - Tent - 22.05.2011, 14:59

RE: Hello from school! - Berserker - 22.05.2011, 15:06

RE: Hello from school! - gamecreator - 22.05.2011, 15:55

RE: Hello from school! - packa - 23.05.2011, 00:00

RE: Hello from school! - Marmot - 24.05.2011, 13:55

RE: Hello from school! - FCst1 - 24.05.2011, 19:35

RE: Hello from school! - packa - 24.05.2011, 20:19

RE: Hello from school! - FCst1 - 24.05.2011, 20:25

RE: Hello from school! - gamecreator - 24.05.2011, 21:06

RE: Hello from school! - Sav - 24.05.2011, 22:58

RE: Hello from school! - packa - 24.05.2011, 23:24

RE: Hello from school! - Tent - 25.05.2011, 16:20

RE: Hello from school! - gamecreator - 25.05.2011, 18:45

RE: Hello from school! - Efrit - 25.05.2011, 19:32

RE: Hello from school! - gamecreator - 25.05.2011, 23:40

RE: Hello from school! - Tent - 26.05.2011, 06:42

RE: Hello from school! - gamecreator - 25.06.2011, 02:00

RE: Hello from school! - Tent - 25.06.2011, 06:19

RE: Hello from school! - packa - 25.06.2011, 08:56

RE: Hello from school! - Tent - 25.06.2011, 10:18

RE: Hello from school! - gamecreator - 25.06.2011, 13:13

RE: Hello from school! - Tent - 25.06.2011, 13:40

RE: Hello from school! - gamecreator - 25.06.2011, 13:48

RE: Hello from school! - Tent - 25.06.2011, 14:26

RE: Hello from school! - gamecreator - 25.06.2011, 14:41

RE: Hello from school! - packa - 26.06.2011, 21:10

RE: Hello from school! - FBX - 29.06.2011, 16:00

RE: Hello from school! - packa - 17.02.2012, 22:53

RE: Hello from school! - Sav - 17.02.2012, 23:09

RE: Hello from school! - Efrit - 17.02.2012, 23:17

RE: Hello from school! - packa - 17.02.2012, 23:26

RE: Hello from school! - Sav - 17.02.2012, 23:39

RE: Hello from school! - packa - 17.02.2012, 23:47

RE: Hello from school! - gamecreator - 18.02.2012, 17:12

RE: Hello from school! - Sav - 18.02.2012, 18:54

RE: Hello from school! - packa - 08.05.2012, 21:27

RE: Hello from school! - gamecreator - 08.05.2012, 22:11

RE: Hello from school! - NIKr0m@nceR - 08.05.2012, 22:20

RE: Hello from school! - packa - 08.05.2012, 22:21

RE: Hello from school! - etoprostoya - 08.05.2012, 22:23

RE: Hello from school! - gamecreator - 08.05.2012, 22:32

RE: Hello from school! - packa - 08.05.2012, 22:47

RE: Hello from school! - gamecreator - 08.05.2012, 23:10

RE: Hello from school! - SyDr - 08.05.2012, 23:12

RE: Hello from school! - packa - 08.05.2012, 23:36

RE: Hello from school! - gamecreator - 08.05.2012, 23:40

RE: Hello from school! - packa - 09.09.2012, 22:38

RE: Hello from school! - NIKr0m@nceR - 10.09.2012, 07:21

RE: Hello from school! - gamecreator - 29.09.2012, 00:27

RE: Hello from school! - gamecreator - 29.09.2012, 02:59

RE: Hello from school! - packa - 01.10.2012, 00:14

RE: Hello from school! - gamecreator - 01.10.2012, 02:27

RE: Hello from school! - packa - 01.10.2012, 23:35

RE: Hello from school! - NIKr0m@nceR - 02.10.2012, 16:08

RE: Hello from school! - gamecreator - 02.10.2012, 20:36

RE: Hello from school! - NIKr0m@nceR - 03.10.2012, 19:00

RE: Hello from school! - gamecreator - 04.10.2012, 05:45

RE: Hello from school! - NIKr0m@nceR - 05.10.2012, 03:54

RE: Hello from school! - packa - 08.10.2012 23:34

RE: Hello from school! - gamecreator - 09.10.2012, 01:22

RE: Hello from school! - packa - 10.10.2012, 19:56

RE: Hello from school! - gamecreator - 10.10.2012, 20:59

RE: Hello from school! - packa - 10.10.2012, 21:16

RE: Hello from school! - gamecreator - 10.10.2012, 21:23

RE: Hello from school! - packa - 10.10.2012, 22:00

RE: Hello from school! - gamecreator - 10.10.2012, 22:20

RE: Hello from school! - packa - 10.10.2012, 22:54

RE: Hello from school! - gamecreator - 11.10.2012, 00:25

RE: Hello from school! - gamecreator - 11.10.2012, 00:38

RE: Hello from school! - packa - 12.10.2012, 08:09

RE: Hello from school! - gamecreator - 12.10.2012, 13:04

RE: Hello from school! - gamecreator - 30.10.2012, 03:21

RE: Hello from school! - packa - 01.11.2012, 19:36

RE: Hello from school! - gamecreator - 04.11.2012, 04:06

RE: Hello from school! - packa - 05.11.2012, 13:36

RE: Hello from school! - gamecreator - 05.11.2012, 14:56

RE: Hello from school! - packa - 02.04.2016, 02:06

RE: Hello from school! - Macron1 - 02.04.2016, 02:35

RE: Hello from school! - packa - 02.04.2016, 11:26

RE: Hello from school! - Efrit - 02.04.2016, 12:14

RE: Hello from school! - Algor - 02.04.2016, 14:57

RE: Hello from school! - Bes - 02.04.2016, 15:02

RE: Hello from school! - Efrit - 02.04.2016, 17:21

RE: Hello from school! - Bes - 02.04.2016, 18:29

RE: Hello from school! - packa - 03.04.2016, 16:49

RE: Hello from school! - Efrit - 03.04.2016, 18:52

RE: Hello from school! - Bes - 03.04.2016, 19:05

RE: Hello from school! - Berserker - 07.04.2016, 18:22

RE: Hello from school! - Algor - 08.04.2016, 23:20

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