Question

Which of the following solids has triangular faces?

• A. Cube
• B. Pyramid
• C. Prism
• D. Cone

Hint:

Pyramids (e.g., tetrahedron) and triangular prisms have triangular faces, unlike cubes (square faces) or cones (curved surfaces).

Answer 1

The Correct Option is B

Defining solids
Step 1: A solid with triangular faces has at least one face that is a triangle.
Analyzing solids
Step 2: Evaluate the solids:
- Cube: Has 6 square faces, no triangles.
- Pyramid: A triangular pyramid (tetrahedron) has 4 triangular faces; other pyramids may have triangular lateral faces.
- Prism: A triangular prism has 2 triangular faces and 3 rectangular faces.
- Cone: Has a circular base and a curved surface, no flat triangular faces.
Clarifying the answer
Step 3: While both pyramids and triangular prisms have triangular faces, the context of “pyramid” (e.g., tetrahedron) typically emphasizes triangular faces.
Thus, pyramid is the best answer.
Thus, the correct answer is (B).