### Home > MC1 > Chapter 2 > Lesson 2.4.1 > Problem 2-133

2-133.

Aidan and Gigi were working together to divide a circle into four equal parts. They came up with the diagrams below.

Gigi said, *"These don't look right to me!"*

Aidan looked at the circles again and said, *"Well, I know at least one of them is OK."*

Is one picture correct? Which one? Why?

Which circle has pieces that can fit perfectly on top of each other?