Mathigon
Mathigon: Euclidean Geometry: Euclid's Axioms
This lesson focuses on Euclid's Axioms, simple, intuitive statements, that everyone agrees are true. An axiom(or postulate) is a mathematical statement that is regarded as "self-evident" and accepted without proof. A key part of...
CK-12 Foundation
Ck 12: Interactive Geometry: 4.1 Theorems and Proofs
Understand theorems and proofs as they relate to geometry.
CK-12 Foundation
Ck 12: Interactive Geometry: 9.7 Design Problems in Three Dimensions
Learn the mathematics behind modeling in three dimensions to maximize or minimize one aspect of the situation.
Mathigon
Mathigon: Geometry: Symmetry in Physics
This lesson focuses on symmetry in physics. The laws of nature are the name given collectively to the physical rules (usually expressed as mathematical equations) that try to explain everything we observe in the universe.