Microsoft Lies? Diagonal Screen Size vs Area

Microsoft has put up an ad comparing various Windows tablets to the iPad.

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So bigger is better right? On their original ad they claimed that the ASUS VivoTab Smart tablet had more area than the iPad.

But Elliot Temple claims the following:

How can the screen with a larger diagonal measurement be smaller? Because itโ€™s a different shape. Long and thin gets you a bigger diagonal but a smaller screen, for the same diagonal inches.

Who’s right? Microsoft or Elliot? Great math involved here.

[edit – 5/28/13: This post links in very nicely with the Mathalicious lesson Viewmongous. Thanks Fawn Nguyen!]

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