I am reading Euclid's Elements and learning the basics of Euclidean geometry.

Euclidean geometry is a branch of mathematics that studies the shapes of planes and spaces.

Euclidean geometry forms the foundation of geometry.

He is good at solving geometry problems.

He is good at solving geometry problems.

He is interested in geometrical shapes.

He is an expert in algebraic geometry.

He is an expert in topology.

I am learning the basic concepts of differential geometry.

Computational geometry is an important field of computer science.