Prove that x=40

- anonymous

Prove that x=40

- jamiebookeater

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- TheViper

Any question ??

- anonymous

x=40, done

- anonymous

drawing my diagram~ wait~ sorry~

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## More answers

- TheViper

:)

- anonymous

XD don't worry

- TheViper

good drawing xD

- anonymous

##### 1 Attachment

- zzr0ck3r

you drew that?

- anonymous

yeap ~

- anonymous

|dw:1346932456806:dw|

- anonymous

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

- anonymous

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

- anonymous

@sauravshakya thanks :))

- anonymous

Welcomx

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

Ya.. its a theorem

- anonymous

@sauravshakya Do you know how that your theorem has come about...

- anonymous

It is a derived theorem...

- anonymous

derived using other theorems.

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

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