What is the Euclidean geometry?

Question

Euclidean

Answer 1

you can google this and get many formal definitions

basically Euclidian geometry is the study of plane geometry and solid geometry

plane geometry is the study of (2-dimensional) figures that lie in a plane such as points (no dimensions), lines (1 dimension), triangles, rectangles, circles, and so on

solid geometry is the study of (3-dimensional) figures that exist in space such as rectangular solids, prisms in general, cylinders, spheres, cones, and pyramids

you study this in high school geometry