Question:
How many faces are there in a triangular prism?
How many faces are there in a triangular prism?
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A triangular prism has 2 triangular bases and 3 rectangular lateral faces, totaling 5 faces.
Updated On: Nov 12, 2025
- 4
- 3
- 2
- 5
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The Correct Option is D
Solution and Explanation
Defining a triangular prism
Step 1: A triangular prism is a three
-dimensional shape with two parallel triangular bases connected by three rectangular faces.
Counting faces
Step 2: The prism has:
- 2 triangular faces (bases)
- 3 rectangular faces (lateral surfaces) Total = \( 2 + 3 = 5 \) faces.
Evaluating options
Step 3: Analyze the options:
- (A) 4: Incorrect, undercounts the faces.
- (B) 3: Incorrect, too few.
- (C) 2: Incorrect, too few.
- (D) 5: Correct, as a triangular prism has 5 faces.
Thus, the correct answer is (D).
Step 1: A triangular prism is a three
-dimensional shape with two parallel triangular bases connected by three rectangular faces.
Counting faces
Step 2: The prism has:
- 2 triangular faces (bases)
- 3 rectangular faces (lateral surfaces) Total = \( 2 + 3 = 5 \) faces.
Evaluating options
Step 3: Analyze the options:
- (A) 4: Incorrect, undercounts the faces.
- (B) 3: Incorrect, too few.
- (C) 2: Incorrect, too few.
- (D) 5: Correct, as a triangular prism has 5 faces.
Thus, the correct answer is (D).
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