Draw an angle of measure $84°$ and construct its angle bisector.

With a ruler and compass only construct the following angle:

$120°$.

With a ruler and compass only construct the following angle:

$135°$.

If image of points $A$ and $B$ in the given line are $P$ and $Q$, respectively then $PQ$ is equal to _____. $\left(AB/AP/AQ\right)$

How many circles can be drawn passing through two given points?

Choose from options: (Zero/One/Four/Infinite)