Defining a triangle
Step 1: A triangle is a three
-sided polygon.
Evaluating shapes
Step 2: Analyze the options:
- (A) \(\triangle\): Represents a triangle, a three
-sided shape.
- (B) \(\Box\): Represents a square, a four
-sided shape.
- (C) \(\circ\): Represents a circle, which has no sides.
- (D) None of these: Incorrect, as \(\triangle\) is a triangle.
Confirming the answer
Step 3: The symbol \(\triangle\) clearly denotes a triangle.
Thus, the correct answer is (A).