Question

Find the length of the radius. Identify the point of tangency, and enter the equation of the tangent line atthat point310ІВ10The radius of the circle is units, and the point of tangency isThe equation of a vertical line through this point is

Answer 1

The radius of the circle is from (0 to -2) on the plot, and it is:

`\begin{gathered} 0-(-2) \\ 0+2 \\ 2\text{ units} \end{gathered}`

The radius of the circle is 2 units

The point of tangency is the point where the straight line touches the circle:

And it is on the coordinate -2 on the x-axis and coordinate 0 on the y-axis

In coordinate geometry, the point of tangency is represented thus: (-2,0)

The equation of a vertical line through this point is

`x=-2`