An equilateral triangle has three equal sides and three equal angles of 60° each.
• All 3 sides equal — TRUE for equilateral.
• All 3 angles the same — TRUE (each is 60°).
• Each angle is 60° — TRUE (180° รท 3 = 60°).
• 1 angle is 90° — FALSE. An equilateral triangle has no right angle.
Final Answer: D: 1 angle is 90 degrees