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WikiCards · Card list · Science cards · Polar coordinate system
Uncommon card · Science
Polar coordinate system, an Uncommon card
In mathematics, the polar coordinate system specifies a given point in a plane by using a distance and an angle as its two coordinates.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 78
- DEF
- 70
- Power
- 148
- Wikipedia reads a year
- 150,000
Power 148 (ATK + DEF): stronger than 75 % of WikiCards cards.
Polar coordinate system quiz: 3 questions
Three questions on the Polar coordinate system card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
The pole is analogous to the origin in a ______ coordinate system.
Answer
Cartesian. The pole is analogous to the origin in a Cartesian coordinate system. From the Polar coordinate system article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Fuzhou. Fuzhou 85 · Polar coordinate system 78 · Metallurgy 74 · Wilhelm Röntgen 70 ATK in WikiCards.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- These are the point's distance from a reference point called the pole, and the point's direction from the pole relative to the direction of the polar axis, a ray drawn from the pole.
- The distance from the pole is called the radial coordinate, radial distance or simply radius, and the angle is called the angular coordinate, polar angle, or azimuth.
- The pole is analogous to the origin in a Cartesian coordinate system.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Polar coordinate system article was read about 150,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 78 and blocks with 70: each hit it takes is cut by 28 %.
How to get Polar coordinate system
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.
More Science cards
Cards close in power
The cards just above and just below Polar coordinate system in the power ranking, all domains together.
- Dick DaleUncommon · Arts · ATK 75 DEF 73
- EthyleneUncommon · Science · ATK 72 DEF 76
- FuzhouUncommon · Society · ATK 85 DEF 63
- ValparaísoUncommon · Society · ATK 84 DEF 64
- BalladUncommon · Arts · ATK 70 DEF 78
- MetallurgyUncommon · Science · ATK 74 DEF 74
Card lists
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Credits
Text : Wikipedia, Polar coordinate system (revision), CC BY-SA 4.0. Photo : Monsterman222, CC BY-SA 3.0, Wikimedia Commons.
