quadrilateral formula

21:46

2:11

5:07

6:00

7:46

3:54

6:07

5:14

8:23

6:18

13:56

6:49

21:47

24:06

9:35

1:11:57

1:27:24

22:39

1:13:46

23:07

3:12

5:56

28:23

7:32

4:30

8:15

4:19

2:48

13:07

12:29

2:06

7:34

7:08

6:26

7:09

3:14

21:07

4:10

4:39

9:26

1:01:44

29:19

00:21

2:28

22:09

12:59

5:49

48:21

15:57

22:27

10:43

21:23

9:10

2:31

12:26

9:06

2:06

17:24

27:40

11:52