Explanation:
Hello! Remember you have to write complete questions in order to get good and exact answers. I'll assume that you have a circle X having two tangent lines that intersect at a point outside the circle. From geometry, we know that from any point outside a circle, two tangents to that circle are always congruent to each other if they meet at the mentioned point. So if the point of intersection is called Z, and a line is tangent to the circle at a point Y, ZY must be equal to ZW because ZW is tangent to the same circle at point W and meets ZY at a point outside the circle, then it is true that:
[tex]\overline{ZY}=\overline{ZW} \\ \\ \boxed{\overline{ZY}=3}[/tex]
So the ZY must be equal 3 in order for ZY to be tangent to circle X at point Y
