Final answer:
Sneferu's first pyramid after it collapsed is known as the Meidum Pyramid, which led to the construction of the successful Red Pyramid and served as a precursor to the Great Pyramid of Giza built by his son Khufu.
Step-by-step explanation:
Sneferu's first pyramid after it collapsed is referred to as the Meidum Pyramid, which was his initial attempt at creating a smooth-sided pyramid. The pyramid encountered structural issues and eventually collapsed, leading Sneferu to construct two more pyramids, including the famous Red Pyramid and the Bent Pyramid.
The Red Pyramid is notable for its reddish limestone, becoming Sneferu's first successful smooth-sided pyramid. You can still see the Red Pyramid today, and it served as a precursor to the even more magnificent Great Pyramid of Giza, built by Sneferu's son, Khufu.