Laydi iyo cirif

Bar waxaa lagu sifayn karaa laba siyaabood. Koordinaytyada laydiga ah, $P(x,\ y)$: $\displaystyle x$ dhinac ah iyo $\displaystyle y$ kor ah. Koordinaytyada cirifka, $P(r,\ \theta)$: fogaan $\displaystyle r$ ah oo barta asalka laga cabbiro iyo xagal $\displaystyle \theta$ ah. Si aad uga gudubto laydi una gudubto cirif, $r=\sqrt{x^{2}+y^{2}}$, $\displaystyle \theta = \arctan\frac{y}{x}$. Si aad u soo noqoto, $x=r\cos\theta$, $\displaystyle y = r\sin\theta$. Xisaabiyuhu labada rogisba wuu sameeyaa, natiijooyinkana wuu kaydiyaa: $\displaystyle r$ ama $\displaystyle x$ xusuusta X, $\displaystyle \theta$ ama $\displaystyle y$ xusuusta Y.

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