Introduction

• Question: How much would a salt mine produce and sale per year?
• Background: This lesson is to find the area of various geometric shapes.
• Textbook Resource: Holt Geometry, pp. 296, 304, 306
• Time Required: 20 minutes

Prerequisites(s)

The following information would be helpful in order to successfully accomplish this activity.

• Suggestion one: Know what the icons mean.
• Suggestion two: Know how find the area formula for each shape.
• Suggestion three: Look over the links below concerning salt production and geometric shapes.
  • http://www.saltinstitute.org/22.html
  • http://www.saltinstitute.org/33.html
  • http://www.mathleague.com/help/geometry/area.htm

Standards Addressehttp:

• S2.4 Compute length, perimeter or circumference, area, volume, and surface area of
  geometric figures with missing information and correctly identify the appropriate unit
  of measure of each.
• S2.5 Use geometric tools (e.g., protractor, compass, straight edge) to construct a variety of
  figures.

Instructions

1. Accessing Project
   1. Download the resource Woods County Satelite Image. (This will take quite a while, the file is very large) If possible, your teacher needs to download this file the day before and have it located where students may access it faster.
   2. Click the 'Extract all files' from the folder task menu on the left.
   3. Choose My Documents as the location to extract to, click finish when done.
   4. Download the Garfield Count Projects Resource
   5. Click the 'Extract all files' from the folder task menu on the left.
   6. Choose My Documents as the location to extract to, click finish when done.
   7. Click HERE for instructions on how to assemble the Garfield County Project.
   8. Once you have assembled the project, open the folder named Woods Project.
   9. Open the fGIS program by pressing on the icon.
   10. Double click the "FGIS" folder and open the #1 file.
   11. Select the Measure project file, which should be listed in menu as an option.
   12. If this is your first time using fGIS, access the video Tour to get started.
2. Lesson Instructions
   1. As per teacher instructions, print off a copy of the map that automatically appears. Do this by selecting
      1. Map >
      2. Print >
      3. Simple Map > and then

      Enter your name in the footer space provided in the popup window and click okay.
      

   2. Frist click on the word Geoshapes in the left hand colum. It should be highlighted blue.
      
   3. For Polygons 2, 4, 7, 13 and 14 measure the length and the width in meters.
      Steps: First click on the icon . Then find the number that you need calculate and click on it for the acre number. Area equals ½ base x height for triangles.
      
   4. For the triangle polygons 1, 3 and 6 measure the length and the width in meters
      Steps: First click on the icon . Then find the number that you
      need calculate and click on it for the acre number.
      
      
   5. For rectangles 5, 12, 7 and 10 use the measure tool to find the height and length of the rectangle then add the height and length using the feet measurment. the length and the width in meters
      Steps: Click on the measuring tool. Then very carefully use the zoom tool the circle with the plus sign on it, and click on the number rectangle at one end and double click on the other.
      
   6. For the remaining shapes 8, 9 and 11 use the measure tool to find the height and length of the rectangle then add the height and length using the feet measurment.
      Steps: Click on the icon then click the shape you need to get the length, height, and acre.