math problem

How can CIRCLES and CIRCULAR ARCS be displayed using OpenGL?
How to represent matrix transformations in OpenGL and hence how can 3D objects be displayed with OpenGL?

Thx a lot

Circles and arcs can be easily represented as a
collection of line segments. The more points you
use, the better the 'approximation" will be.

Matrix transformations in OpenGL are composed for
homogeneous coordinates, which means that they are
all 4x4 rank 2 tensors. I do not know what you are