The wheel breaks on the CyberSquad's scooter, and they need to replace it in order to stop Hacker. They decide to shape one of the stones on the ground into a wheel. Their first attempt fails because the wheel is not round. After more thinking about circles, they figure out how to create a proper wheel.

Matt, Digit, and Slider make a fake ring that looks just like the original in order to trick Hacker. They have the plan from which the original ring was made and simply need to adjust the radius of the inner and outer circles. Digit is confused, so Matt explains what the radius is and how it influences the size of a circle. Slider uses a tool to create the correct ring size, while Digit adds the markings to finalize the fake ring.

Hypatia of Alexandria explains that the center of a circle is always the same distance from any other point of the circle. She also states that a circle is a special type of ellipse.

The Hip Hop Harry crew sings and dances to a song that illustrates basic geometric shapes and examples of them in everyday objects.

Circles are a part of a lot of things: a soccer ball, a clock, and pancakes to name a few! Learn more about this shape with this StoryBots song.