Question

The platonic solid icosahedron has ____ faces.

• A. 15
• B. 17
• C. 19
• D. 20

Answer 1

The correct option is D

20

The correct option is D.

Explanation of the correct option:

1. The name Icosahedron comes from Ancient Greek “eíkosi” meaning 'twenty' and from Ancient Greek "hédra" meaning 'seat'.
2. Icosahedrons are three-dimensional structures referred to as platonic solids, which have 20 faces, 30 edges, and 12 vertices.
3. All the faces consist of equilateral triangles.
4. Many T even and T odd bacteriophage capsid proteins occur in icosahedral symmetry.
5. Popular plant virus Gemini virus also has an icosahedral head.

Explanation of the incorrect options:

Option A: The platonic solid icosahedron does not have 15 faces.

Option B: The platonic solid icosahedron does not have 17 faces.

Option C: The platonic solid icosahedron does not have 19 faces.

Final Answer: Hence, the platonic solid icosahedron has 20 faces.