Question

Prove that the lengths of tangents drawn from an external point to a circle are equal.

Answer 1

$when \: we \: draw \: the \: diagram \: we \: will \: see \: that \: their \: are \: two \: triangle \: make \: them \: equal \: by \: op \: common \: oa = ob \: radius \: andangle \: pao = angle \: pbo \: and \: in \: cpct \: pa \: = pb$