12.1: Surface Area of Cylinders
This activity is intended to supplement Geometry, Chapter 11, Lesson 2.
Problem 1 – Nets
Start the Cabri Jr. application by pressing the APPS key and selecting CabriJr. Open the file CYLINDER by pressing
1. What changes occur to the net when the point
2. What changes occur to the net when the point
3. Record 2 sets of measurements of the net:
Circle Radius | Rectangle Height | Rectangle Length |
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4. What is the result when you divide the Rectangle Length by the Circle Radius?
5. Explain this result. Drag point
Problem 2 – Surface Area
6. Record these measurements:
Circle Radius: __________
Circle Area: __________
Rectangle
Rectangle Area: __________
Rectangle
7. Record the steps you performed to find the surface area of the cylinder:
- _________________________________
- _________________________________
8. What is the surface area of your cylinder?
9. How is the method used in #7 above related to the formula
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