The Solution of the Pyramid Problem; or, Pyramid Discoveries With a New Theory as to their Ancient Use

"The Solution of the Pyramid Problem; or, Pyramid Discoveries" by Robert Ballard is a late 19th-century exploration that introduces a new idea about the pyramids of Giza. Ballard, an engineer, dives into the architectural aspects of the pyramids, especially Cheops, Cephren, and Mycerinus and their geometric layouts to show they were more than just tombs. He argues through historical math and his own work that the pyramids reveal the ancient Egyptians' advanced knowledge of engineering and surveying, using angles and geometric proportions, and revealing their practical utility in measuring and surveying their land.