Final answer:
To safely back out of an angled parking space on a street with 2-way traffic, always back slowly and look over your right shoulder to ensure the way is clear.
Step-by-step explanation:
When backing out of an angled parking space on a street with 2-way traffic, you should always back slowly and look over your right shoulder. This action allows you to have a better view of the traffic in the lane you are entering, ensuring that it is safe to proceed while also allowing you to keep an eye out for pedestrians and other obstacles. Remember, safety is paramount when maneuvering in a parking area, and it's important to use your mirrors in conjunction with over-the-shoulder checks to have a clear understanding of the surroundings.