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.
The CyberSquad and Slider need to find the center of the circle and place the ring there in order to save Cyberspace. Inez and Jackie make a pattern of the circle using cloth and mark halfway points in each direction by folding the cloth evenly. Matt tests that they have marked the exact center by using his yoyo string to ensure ensure that every point on the edge is the same distance from the alleged center.
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.
After eating dinner, Chuck illustrates to Wilson their slim chances of being rescued. He calculates the area that the rescue team would have to potentially search to find them: approximately 502,000 square miles.