Which of the following BEST describes the properties of an equilateral triangle?

Here are the solutions to the problems:

54. Which of the following BEST describes the properties of an equilateral triangle?
An equilateral triangle has three equal sides and three equal angles (each $60^\circ$).

• V. All sides are equal. (True)
• VI. All angles are equal. (True)
• VII. Only two sides are equal. (False, this describes an isosceles triangle)
• VIII. Only two angles are equal. (False, this describes an isosceles triangle) Therefore, properties V and VI correctly describe an equilateral triangle. The correct option is (A).

$$\boxed{\text{A) I and II}}$$

**55. In the triangle ABC, not drawn to scale, AB is 17