Unit 2 Contents

Every runway will have lights all around it. Myrna has to know how much wire is needed to connect these lights. Myrna is trying to find the perimeter of the runways.

For example, a light plane runway that is 5 inches long needs 12 inches of wire for the perimeter lights.

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Since Myrna doesn't know how long the runways will be, she doesn't know how much wire she needs for lights. She has to find how much wire she needs for any kind of runway, no matter how long.

Use the TIMS Laboratory Method to help Myrna. You will work on runways for only one kind of plane, so the width of your runways will all be the same. Your teacher will help you choose.

You will use square-inch tiles to make several runways for your kind of plane. For each runway, you will record the Length (L) and the Perimeter (P) in a data table. Then, you will graph your data and look for patterns.

1. What question is Myrna trying to answer?
2. Draw a picture of the lab on the Exploring Perimeter vs. Length pages in the Student Activity Book.
• Show your kind of airplane and at least one of your runways. Remember the width of all your runways will be the same.
• Be sure to show the variables, Length (L), Perimeter (P), and Width (W).
1. Which variable, Length (L), Width (W), or Perimeter (P), will stay the same for the type of runways you are building?
2. Which two variables will change from runway to runway?