Surface area, an Uncommon card

The card carries these facts from its Wikipedia article.

• The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra, for which the surface area is the sum of the areas of its faces.
• Smooth surfaces, such as a sphere, are assigned surface area using their representation as parametric surfaces.
• This definition of surface area is based on methods of infinitesimal calculus and involves partial derivatives and double integration.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Surface area article was read about 28,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 62 and blocks with 40: each hit it takes is cut by 16 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Surface area in the power ranking, all domains together.