It seems there's a mix-up in your question. Let me clarify the concepts:
Humans did not evolve from monkeys: The theory of evolution suggests that humans and modern apes (like chimpanzees, gorillas, and orangutans) share a common ancestor that lived millions of years ago. This ancestor was neither a human nor a modern ape. Over time, different lineages evolved, leading to the diverse species we see today, including humans and modern apes.
Dinosaurs: Dinosaurs were a diverse group of reptiles that lived millions of years ago. They appeared during the Mesozoic Era and became extinct about 65 million years ago in a mass extinction event. The exact cause of their extinction is still a subject of scientific debate, but it is widely accepted that a catastrophic event, such as an asteroid impact, played a significant role.
Humans and dinosaurs did not coexist: Dinosaurs became extinct long before the first humans appeared on Earth. The first true humans, Homo sapiens, emerged around 300,000 years ago, which is much later than the extinction of the dinosaurs.
In summary, humans and dinosaurs did not live at the same time, and humans did not evolve from monkeys. The theory of evolution explains how different species, including humans and modern apes, share common ancestors and have evolved over millions of years.