Final answer:
The Maya and Aztec civilizations shared similarities in their systems of writing, mathematical knowledge, and monumental architecture.
Step-by-step explanation:
The Maya and Aztec civilizations shared several similarities. Both civilizations had a system of writing. The Maya had a written language that combined alphabetic and hieroglyphic scripts, while the Aztecs had pictographic writing known as Nahuatl. Additionally, both civilizations had advanced mathematical knowledge. The Maya used a base-20 number system and developed the concept of zero, while the Aztecs also had a sophisticated understanding of mathematics. Lastly, both civilizations were known for their monumental architecture, such as pyramids and temples, and engaged in extensive trade networks.