To expand students mathematical understanding of non-prototypical triangles as children frequently develop very restricted conceptions of geometric shapes. They often identify them solely based on ...

The ancient Greek mathematician Euclid proved in his Elements of Geometry that there are only five Platonic solids – the regular tetrahedron (four sides that are equilateral triangles), the cube (six ...

Zigzag partings bring a fun twist to curly hair by disrupting the regularity of curls. To achieve a zigzag parting, place ...

It's possible to demonstrate and prove mathematically that the angle sum of every triangle is 180 degrees. The techniques used are useful for solving all kinds of other geometry problems too.

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 ...