How do I find the measure of the arc or central angle indicated?

Which of the following emerging technologies uses the principle of chromosomes to identify suspects

Where is the only location in the united states where you drive on the left side of the road?

Which statement about factories in the industrial revolution is not true? a) some of the first advances were in textile mills b) spinning machines used water power c) water power was replaced by steam power d) coal was imported to english factories for power answer d) coal was imported to english factories for power