Ricardo and Joe live in houses on the same street, as shown in the diagram. Ben plans to
visit Ricardo one evening, but he's afraid he won't be able to read the house addresses in
the dark. However, he knows where Joe lives.
1. What simple direction can Ricardo give Ben to enable him to find his house after dark?
2. In the example above, what does Joe's house serve as?
3. What other two pieces of information form a complete description of a position?
4. What two terms are sometimes used to indicate opposite directions from a point?
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