## hba 3 years ago The area of the circle x^2+y^2-8x-24=0

1. hartnn

pi*r^2

2. hba

Thanks :)

3. tomiko

find r from the equation and apply $\Pi r ^{2}$

4. waterineyes

What is the value of r here??

5. hba

$r=2\sqrt{10}$

6. waterineyes

How ??

7. hba

$40\pi$

8. tomiko

the general equation of a cirle is $(x-h)^{2} + (y-k)^{2} = r ^{2}$ compare this to your equation and find "r"

9. hba

$r=\sqrt{g^2+f^2-c}$ $r=\sqrt{16-(-24)}=\sqrt{16+24}=\sqrt{40}$

10. waterineyes

I know that.. I am asking find here proper value for r..

11. hba

r is r come on ?

12. waterineyes

Are you not getting 8 ??

13. waterineyes

Ok, I am wrong..

14. waterineyes

Yes @hba you are right..

15. hba

@waterineyes Why do you keep confusing me lol haha

16. hba

So 40pi is final :D

17. waterineyes

Ha ha ha ha..

18. hartnn

lol :P

19. hartnn

good going @waterineyes

20. tomiko

in this case compare your equation to $x ^{2} + y ^{2} + 2gx + 2fy + c = 0$ where $r = \sqrt{g ^{2} + f ^{2} - c}$

21. waterineyes

Thanks @hartnn

22. tomiko

do you get it now?

23. waterineyes

@tomiko you are late dear but it is okay.. ha ha ha ha..

24. waterineyes

Anyways, thanks for reminding me the equation of circle..

25. hba

@tomiko No i do not get it bcx i have already got it :D

26. hba

@waterineyes Don't worry :)

27. waterineyes

28. hba

29. waterineyes

For what??

30. waterineyes

And I am having a pc not laptop..

31. hba

Like wifi

32. tomiko

haha no problem. you guys are funny! =))

33. hba

Still counts...

34. hba

No we do do not work in the circus,we are just havin fun ;D @tomiko

35. waterineyes

I am comfortable with this slow running and at the same time ruining tortoise Internet Stick..

36. hba

The center of the circle x^2+y^2-6x+8y-24=0 I got (3,-4) right or wrong ? @waterineyes

37. hba

@waterineyes How can you live in this world with such an awesome internet connection :)

38. waterineyes

It is awesome that is why I am living and at the same time leaving on it..

39. hba

@waterineyes What about my ques ?

40. waterineyes

(3,-4) is right..

41. hba

So none of the above :D

42. waterineyes

No..

43. hba

Shuuu

44. hba

It is not in options lol

45. waterineyes

46. hba

For you ^

47. waterineyes

Yep.. Going to sleep.. 12:51 am here.. Good Night. @hba

48. hba

Please see my last quessss :(

49. hba

@waterineyes ??