Understanding different types of angles and that angles in a triangle sum to 180° can be helpful when classifying a triangle. Recognising line symmetry and rotational symmetry will also help. Look for ...

Named for Plato, who theorized that the classical elements were made of these regular polyhedrons, three of the Platonic solids are composed of equilateral triangles: the tetrahedron, octahedron, and ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...

If you take a moment to look around, you will find that our environment is a montage of geometric shapes. They are the building blocks of the world around us and are more important than we realize as ...

The study of conformal (angle-preserving) maps has a long history. Since the earth is curved, any geographical map has to distort either angles or sizes. For navigation, conformality - preserving ...