Final answer:
The Egyptians used engineering, mathematics, chemistry, and astronomy to construct the pyramids.
Step-by-step explanation:
In order to construct the pyramids, the Egyptians needed to be proficient in engineering and chemistry. They used mathematics to calculate angles and measurements for the construction of the pyramids. Chemistry was essential for creating strong and durable building materials, such as limestone mortar. Astronomy also played a role in aligning the pyramids with celestial bodies.
Learn more about Construction of the pyramids in ancient Egypt