Geometry

Question Analysis:
This question involves understanding the fundamental properties of equilateral triangles.
The main focus is on recognizing the defining characteristics of equilateral triangles.

Key Concept Explanation:
In an equilateral triangle, all three sides and angles are equal.
Each interior angle is always 60°.
The perpendicular bisector, angle bisector, median, and altitude all coincide.

Step-by-Step Solution:
Option A: True. This is the definition of an equilateral triangle.
Option B: True. Each angle in an equilateral triangle is always 60°.
Option C: True. The altitude in an equilateral triangle also bisects the angle.
Option D: False. A right angle (90°) would make it impossible for all three angles to be equal.
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