Radon's Theorem: Geometry, Convex Set

Hadwiger's Theorem: Integral Geometry, Finite Unions, Convex Set

Kakutani's Theorem (geometry): Geometry, Shizuo Kakutani, Convex Body

Cauchy's Theorem (geometry): Geometry, Augustin Louis Cauchy, Convex Polytope

Carathéodory's Theorem (convex hull): Convex Geometry, Hull, Constantin Carathéodory