Question

Which one is equilateral triangle?

• A. \( \triangle \) (with equal sides implied)
• B. \( \rhd \) (right-angled triangle)
• C. \( \square \)
• D. \( \bigcirc \)

Hint:

Remember the main types of triangles by sides: Equilateral (3 equal sides), Isosceles (2 equal sides), and Scalene (no equal sides).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
The question asks to identify an equilateral triangle. An equilateral triangle is a triangle in which all three sides have the same length. A consequence of this is that all three interior angles are also equal, each measuring 60°.
Step 2: Detailed Explanation
Looking at the visual options:
(A) shows a triangle that appears to have sides of equal length. This is the representation of an equilateral triangle.
(B) shows a triangle with a right angle, which is a right-angled triangle.
(C) is a square.
(D) is a circle.
Thus, option (A) represents an equilateral triangle.