plzzz  i want an proof abt

the length of tangents drawn from an external point of a circle are equal

 

not frm the text book's theorem plzzzz

 sorry ..dont know it exactly??

sorry guy ........we are tought only this theorem ......as we have only this in our syllabus ....how can we prove it from outside the textbook ??....for that we have to make a new theorem .....

DRAW A CIRCLE WITH CENTRE O AND TANGENTS PA AND PB.

NOW SEE IN TRIANGLE PAO AND PBO

AO = BO [RADII]

ANGLE PAO = ANGLE PBO [90]

PO = PO [COMMON]

THEREFORE TRIANGLE PAO = PBO [ RHS CONGRUENCY]

THEREFORE PA = PB [C.P.C.T.]