Allied & ICAR Exam Bank • ALLIED_2450 MCQ • 2 Marks

Section 8: General Aptitude

Analytical & Spatial Aptitude

Subtopic: Spatial Reasoning & 3D Representations

Question Statement:

Four congruent equilateral triangles of side length s can be folded along their shared edges to form which 3D Platonic solid?

Options:

  • (A) A regular tetrahedron
  • (B) A regular octahedron
  • (C) A regular icosahedron
  • (D) A square pyramid

Answer Key:

A

Step-by-Step Solution & Explanation

Four congruent equilateral triangles joined at shared edges form the net of a regular tetrahedron (which has 4 triangular faces).
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