finding coordinates of a vertex

3:27

2:14

3:37

4:55

8:11

9:57

10:10

7:39

7:47

6:17

6:33

3:05

1:28

19:49

10:18

11:57

1:52

1:07

1:16

8:48

10:34

2:02

7:23

5:01

1:21

8:17

7:41

11:25

5:13

7:00

7:09

1:15

1:28

3:12

کوتاه

8:17

2:23

14:25

6:27

4:17