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Tricking Hacker

Media Type:
Video

Running Time: 1m 33s
Size: 4.4 MB

or

Source: Cyberchase: "Borg of the Ring"

Collection Developed by:

Collection Credits

Collection Funded by:

Funding for the VITAL/Ready to Teach collection was secured through the United States Department of Education under the Ready to Teach Program.

In this video segment from Cyberchase, Matt, Digit and Slider must create an exact copy of a large ring in order to activate a powerful force and foil Hacker. To make sure the copy they make is perfect, they have to know what the “radius” of a circle is and figure out a way to carefully measure it.

Connections

TERC (2006)
Turtle Paths
Investigation 2, Sessions 1-3: pp. 31-40

Teaching Tips

Here are some Frame, Focus and Follow-up suggestions for using this video in a math lesson.

What is Frame, Focus and Follow-up?

Frame: All shapes have certain features or properties that help us define them. For example, how do we know when a four-sided shape should be called a square and not a trapezoid? What is it about a circle that makes it a circle? Sometimes measuring helps with the process of defining a shape. Can you think of an example?

Focus: As you watch this segment, ask yourself, “What feature or property of a circle helps Matt, Digit and Slider figure out how to create the exact copy of the ring they need? Was measurement involved?"

Follow Up: How did Matt, Digit and Slider create the exact copy of the ring? What is the “radius"? How would you find the radius of a circular object like a pie plate or Frisbee®? What other properties of a circle would be helpful to know if you had to create an exact duplicate without tracing?

Transcript

MATT: The fake ring has to look just like the original - the same shape, same size, same everything, or it won't work.

DIGIT: Yeah! How you gonna pull that off?

SLIDER: With this. It's the plan the original ring was made from.

MATT: Whoa! Where'd you get that?

SLIDER: My father. We gotta cut out a circle that matches this ring exactly.

MATT: We need to cut out two circles! One for the inside edge of the ring - the other for the outside edge.

DIGIT: But, how do we know how big to make 'em?

DIGIT: Uh huh...What am I missing here?

MATT: Don't worry, Didge. The radius is the distance from the center point out to the edge of the circle. To change how big or small a circle is, just change the radius! I'll show you.

SLIDER: Never Mind. I'll...make it! And I've got just the tool to do that!

MATT: Sheech. What's with this guy?

SLIDER: Inner circle radius: 19 Cyber units. Outer circle radius: 23 cyber units. We just have to put the markings on it.

DIGIT: May I?

SLIDER: Sure.

MATT: An exact copy! Let's make the switch.

Standards

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