## Kystal 3 years ago Prove that x=40

1. TheViper

Any question ??

2. decripter37

x=40, done

3. Kystal

drawing my diagram~ wait~ sorry~

4. TheViper

:)

5. decripter37

XD don't worry

6. TheViper

good drawing xD

7. Kystal

8. zzr0ck3r

you drew that?

9. Kystal

yeap ~

10. sauravshakya

|dw:1346932456806:dw|

11. sauravshakya

Now, use Sum of all angles of a triangle = 180

12. punnus

The two adjacent line are a tangent tot eh circle and also thery along with the lines forming the 70 angle form a quadrilateral. The sum of angles in a quadrilateral is 360 and angle formed by tangent is 90. Now I guess you can solve

13. Kystal

@sauravshakya thanks :))

14. sauravshakya

Welcomx

15. sauravshakya

@punnus the angle u are saying is not 90 because the lines are not radius or diameter

16. punnus

I know that. I wants trying to give hints to solve the question and not the solution.

17. punnus

Were @sauravshakya were you able to tell her why the rest of the angles of the triangle are 70.

18. sauravshakya

Angle between a tangent and a chord at the point of contact is equal to the opposite angle formed by the chord at the circumference

19. Kystal

@punnus it's one of the rules in a circle i know~but thanks anyway~ :)

20. sauravshakya

Ya.. its a theorem

21. punnus

22. punnus

It is a derived theorem...

23. punnus

derived using other theorems.

24. sauravshakya

Actually its not my theorem.. BUT IF u are asking for a proof then U can search it on google

25. punnus

I know the proof of this so called theorem...

26. punnus

My point is that when ever you solve a question solve it frm the basic theorems that are present and not the derived ones

27. punnus

@sauravshakya If you want i can prove it for you right now...

28. sauravshakya

I also know the proof..... But if u r willing to prove it then OK PLZ TAKE YOUR PRECIOUS TIME AND PROVE IT

29. sauravshakya

To know how to use the theorem is better then to know the proof of it