Euclidean geometry forms the foundation of geometry.

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.

Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

Riemannian geometry is a field of mathematics that studies geometric objects such as curves and surfaces.

He is good at solving geometry problems.

He told me the whole story of the incident.

He conducted an experiment using a spherical lens.