An equilateral triangle has three equal sides and three equal angles. Each angle measures 60° (since 180° รท 3 = 60°).
• Sum of angles is 360° — FALSE (sum is 180° in any triangle).
• Only 2 angles equal — FALSE (all three).
• Only 2 sides equal — FALSE (all three).
• All angles equal to 60° — TRUE.
Final Answer: D: All angles must be equal to 60 degrees