Question

Why $\overline{TK}$ is not a chord of $\odot o$.

Short answer

$\overline{TK}$is not a chord.

Step-by-step solution

Step 1. Given information. 

Figure is given.

Step 2. Concept used.

Chord : Any segment whose real end points lie on the circle is called chord of the circle.

Step 3. Solution.

Now, it can be observed that $\overline{TK}$is a segment whose one end point T lie on the circle but the other end point K does not lie on the circle, in fact it lie in the interior of the circle.

Therefore, by above definition, $\overline{TK}$ is not a chord.