• Click on the link below.
• Drag the vertices of the rectangle.  Notice the changes of the side lengths and the perimeter.

Modify the file:

• Add a 5th point and sliders in the Points folder.
• Add an additional side in the table.
• Link the image "E" (found in the Images folder) to the 5th vertex.

Modify the expressions and formulas found in the Calculations & Table folder.

• Modify the "DA" formula to "DE" formula.
• Add a "EA" formula.
• Change the formula for the perimeter to reflect all 5 sides.
• At the top, add the DE and EA formulas.
• Verify your work!

Rename the file: Pentagons: Side Lengths and Perimeter

Save to your Desmos Account & save to your Google spreadsheet.