Activity
Annenberg Foundation

Annenberg Learner: Geometry 3 D Shapes: Platonic Solids

For Students 9th - 10th Standards
Learn about platonic solids, a special type of polyhedra. Read a definition, make three-dimensional models using printouts, and play with an interactive animation, which will show you the faces, vertices, and edges on platonic solids:...
Lesson Plan
Alabama Learning Exchange

Alex: Platonic Solids Ornaments

For Teachers 9th - 10th
This is a hands-on activity that introduces students to the five Platonic solids. Students will discover the special relationship between faces, vertices, and edges. Students will research the Platonic solids and then construct and...
eBook
Mathigon

Mathigon: Geometry: Polygons and Polyhedra: Polyhedra

For Students 9th - 10th Standards
This lesson focuses on polyhedra; a polyhedron (the plural is polyhedra) is a 3-dimensional solid object that is made up of polygons. Euler's Polyhedron Formula: In every polyhedron, the number of faces (F) plus the number of vertices...
Handout
Other

Geeks for Geeks: Graph Coloring|set 1 (Introduction and Applications)

For Students 10th - 12th
Graph coloring problem is to assign colors to certain elements of a graph subject to certain constraints. This source looks at different applications of graph coloring.

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