Icosahedron has twenty faces that are equilateral triangles.
What is Icosahedron?
Icosahedron is one of the 5 Platonic solid which has 20 faces, 12 vertices, 30 edges.
All the faces of Icosahedron is an equilateral triangle at each vertex. also all the faces are congruent and are of the same size.
From the picture given below, it is also clear that
Icosahedron has twenty faces that are equilateral triangles.
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