12 regular pentagons come together to form a perfect solid
Draw and connect 12 regular pentagons on paper like this, then fold them to create a perfect solid called a dodecahedron. Move the slider to see the flat net fold into a three-dimensional solid.
Dodecahedron: A solid whose faces are all congruent regular pentagons, with three faces meeting at each vertex. There are exactly five Platonic solids (convex polyhedra whose faces are all congruent regular polygons), and this is often considered the most visually elaborate of them.
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💡 A dodecahedron has 20 vertices, 30 edges, and 12 faces. Check Euler’s formula, vertices − edges + faces = 2: 20−30+12=2, exactly as expected!