10. Use the Rectangle tool and create a new rectangle just above the first two (below left), Release the mouse button and this new rectangle will be selected (below right).

11. Again, using the Transform panel, enter "-50" in the horizontal box and a zero in the vertical box under the "Skew angles:" section. Click "Apply" to skew the rectangle.

12. Press the "Rotate" button on the Transform panel.

13. Enter "15" for the rotation angle and click "Apply".

Note: You can calculate the amount of skew and rotation for the top rectangle. The -50° of skew is the result of 90 minus 25 (for the amount of vertical skew on the left rectangle) minus 15 (for the amount of vertical skew of the right rectangle). The 15° of rotation is the same as the amount of skew on the right rectangle. You can vary these amounts to achieve different effects.

14. Click away to deselect the top rectangle, then drag it downwards by the lower corner point until it snaps to the corner point of the first two rectangles as shown below.

15. Position the mouse pointer over the far right corner point of the top rectangle until you see the small square next to the pointer.

16. Click and drag this point until it snaps to the upper right corner point of the rectangle below.

17. Position the mouse pointer over the far left corner point of the top rectangle until you see the small square next to the pointer.

18. Click and drag this point until it snaps to the corner point of the lower right rectangle.

19. The box is finished. You can always vary the angles to achieve a true isometric angle (30 degrees for the left and right rectangles) or experiment with them for the desired effect. In the following steps, you'll see how to use this same box as a basis for creating a number of boxes with the same orientation.

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