In this question, we need to find a pair that has the same type of relationship as "Circle: Circumference." Let's analyze each option:
Conclusion: The correct pair that mirrors the relationship "Circle: Circumference" in terms of a shape and its boundary is "Rectangle". The reason is that while "circumference" is used for the boundary of circles, "perimeter" is used for rectangles. Both have the same context of defining the boundary measurement of their respective shapes.
Therefore, the correct answer is Rectangle.