## anonymous 5 years ago how to find angle b/w two vertex in a circle????

1. anonymous

u have picture?

2. anonymous

wait

3. anonymous

what do u mean by vertex in a circle?

4. anonymous

yeah..a picture might help

5. anonymous

?

6. anonymous

i'm trying to find a picture pls w8 for couple of more mis

7. anonymous

I be back, the angles depen

8. anonymous

here is the pic

9. anonymous

angle b/w A and B

10. anonymous

what w?

11. anonymous

between A and B?

12. anonymous

yeah

13. anonymous

A and B are the points on a circle, u can find the central angle of the arecAB

14. anonymous

arc AB*

15. anonymous

just 90 degrees lol

16. anonymous

why make it complicated

17. anonymous

well, the figure is drawn roughly, may not b perpendicular

18. anonymous

how to find the central angle

19. anonymous

>>

20. anonymous

21. anonymous

$r=l \theta$

22. anonymous

$l=r \theta$

23. anonymous

24. anonymous

A B is 90 degree then the central angle is the same

25. anonymous

yeh, thats prob it , im not paying much attention tonight

26. anonymous

the angle on the circle is 1/2 angles in center

27. anonymous

radius is 50 mm and length is 78.5 mm but i'm getting 1.57 deg

28. anonymous

29. anonymous

78.5/50

30. anonymous

if you are using l =r theta

31. anonymous

pi radians = 180 degrees , therefore 1 radian = 180 / pi degrees

32. anonymous

which works out as 90degrees exactly

33. anonymous

so I was right from the start :P

34. anonymous

how come?

35. anonymous

what do u mean how come, I was right

36. anonymous

right if the lines are perpendicular,

37. anonymous

well, it turns out they are :P

38. anonymous

yes, the seem to be :)

39. anonymous

but actually the qs is to find the angle b/w A n B

40. anonymous

41. anonymous

angle is 90 , done

42. anonymous

angle is 90 , done

43. anonymous

conditiionally done ;)