Answer:
advantage
* The scale is essential consant;
*Some objects not visiable on vertical photos may be seen in obiliqe.
disadvantage
*it lacks marginal .
*it requires more training to interpert than a map.
Answer: The answer is 9 countries.
Explanation: Bulgaria, Croatia, Czech Republic, Denmark, Hungary, Poland, Romania, Sweden, and the United Kingdom (None of them use the euro)
