Construct and Calculate Rectangles

1. Generate side lengths

• Click on the **New Dimensions** button (and wait 2 secs).

REMEMBER: You can always click on (top right) to undo your last action.

2.Construct a rectangle with these dimensions (Click on Previous Activity if you want to review the steps .)

3. Mark your dimensions.

• Right-click on the base line, click on Properties,

Select "Show Label" and then click on the next to Name and select Value. Hit Enter. You should now see the base dimension.

• Right-click on one of the sides, click on Properties,

Select "Show Label" and then click on the next to Name and select Value. Hit Enter. You should now see the height.

4. Calculate the perimeter of your rectangle and then click on Show Perimeter to check your work.

6. Play with your rectangle.

• Click and drag any blue point (A moves the rectangle, B rotates the rectangle). Notice that neither the rectangle, nor the perimeter nor the area ever changes since they are all completely defined/determined by the length of the two sides and the 90° angles.

• Click on **Reset** to start over.