Figure 2From: The curl theorem of a triangular integralTriangularly divided areas in the case of n = 2.The area of triangle P0P1P2 is σ 2 = R 2 . 0 - R 2 . 1 - R 2 . 2 = 1 2 Δ x 2 Δ y 1 - Δ y 2 Δ x 1 . Back to article page