Explain how far (geographically) culture in the hellenistic age reached

After learning about the Hellenistic Age (Chapter 4 lecture), answer the following question. Follow the directions carefully in order to receive full credit. 
Chapter 4 Lecture Question:
What was the Hellenistic Age and how did it come to be?
Directions for Answering the Question:
Using information from the lecture, 
Explain what the Hellenistic Age was by offering a brief definition and the years during which it took place