What is the following type of art called and what technologies does one need to learn in order to produce this style of art? The best word I can think of to describe the art is low-poly but I have a suspicion this term isn't accurate.

The above image was obtained from this link: https://vueschool.io/

Other examples of this type of art can be found here: https://www.manypixels.co/?fbclid=IwAR0vTOD5im1dMec-4li8zENUx4DUv_fAkjnvpO8QFF4Ds5FimhpbLqoQal4