Question Bank • QB_GA_ASA_015
MSQ • 2 Marks
Section 8: General Aptitude
Analytical & Spatial Aptitude
Subtopic: Spatial Reasoning & 3D Representations
Question Statement:
Which of the following convex regular polyhedra (Platonic solids) has/have faces that are congruent equilateral triangles?
Options:
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(A) Regular Tetrahedron
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(B) Regular Octahedron
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(C) Regular Icosahedron
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(D) Regular Dodecahedron
Step-by-Step Solution & Explanation
Among the five Platonic solids in 3D Euclidean geometry:
• Regular Tetrahedron: 4 equilateral triangular faces (Correct).
• Regular Octahedron: 8 equilateral triangular faces (Correct).
• Regular Icosahedron: 20 equilateral triangular faces (Correct).
• Regular Dodecahedron: 12 regular pentagonal faces (Incorrect).
• Regular Hexahedron (Cube): 6 square faces.
Therefore, options A, B, and C are equilateral triangular.
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