Question

Name the line tangent to sphere.

Short answer

The tangent of sphere is $\overline{EF}$.

Step-by-step solution

Step 1. Given information. 

Figure is given.

Step 2. Concept used.

The tangent is a straight line that just touches the curved surface.

Step 3. Find the tangent.

The line $EF$touches the sphere at $F$. Thus the line $EF$is a line tangent to the sphere $Q$.

Therefore, tangent of sphere is $\overline{EF}$.