A line is tangent to a circle if and only if it is perpendicular to a radius at the radius’s endpoint on the circle
http://media.education2020.com/EVresources/2072546_0c21b095-f79f-446e-93ba-04e6b8568f15.png

Question

A line is tangent to a circle if and only if it is perpendicular to a radius at the radius’s endpoint on the circle 
http://media.education2020.com/EVresources/2072546_0c21b095-f79f-446e-93ba-04e6b8568f15.png

amistre64 · Answer

and i assume that the sop line is tangent as well, giving us that the top line is equal to the bottom

amistre64 · Answer

*top line

amistre64 · Answer

equate the equations and solve for x

anonymous · Answer

Done. THank you for helping