During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and :-

The bacterial chromosome is a single circular DNA molecule with one origin of replication (ori).
At the origin, the DNA double helix opens to form a replication bubble with two replication forks.
The two forks move away from the origin in opposite directions around the circle, so replication proceeds in both directions (bidirectional replication) until they meet at the terminus. This gives the theta structure seen by Cairns.
Telomerase is found only in eukaryotes, which have linear chromosomes with telomeres; it is not needed for circular bacterial DNA.
RNA primers are indeed needed to start each new DNA strand, but the feature that describes how synthesis proceeds from the origin, as the question asks, is bidirectional movement.
So DNA synthesis starts at the origin and moves in a bi-directional way.