They were tombs to honor the royals in ancient Egypt. They were built in triangular prisms, but the insides were built like mazes so that robbers could not find the treasure that was buried alongside pharaohs and royalty.
The ancient Egyptians built pyramids as tombs for the pharaohs and their queens. The pharaohs were buried in pyramids of many different shapes and sizes from before the beginning of the Old Kingdom to the end of the Middle Kingdom.
The correct answer to this question is: concurrent powers.
Concurrent powers are shared powers such as the power to tax, the power to maintain courts (i.e. state and federal courts, as you now know), and the power to borrow money.