02.28.2017. Tuesday
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 Geometry Two-dimensional geometric shapes⦿ Rhombus⦿ Parallelogram⦿ Trapezoid⦿ Kite⦿ Circle⦿ Circular sector⦿ Circular segment⦿ Area of a Triangle⦿ Squere⦿ Rectangle Three-dimensional geometric shapes⦿ Cube⦿ Sphere⦿ Cylinder⦿ Cone⦿ Prism⦿ Pyramide⦿ Platonic solids Trigonometry⦿ Law of Sines⦿ Law of Cosines⦿ Trygonometry Identities of same angle⦿ Identities for the sum and difference of two angles⦿ Trigonometric identities of double angles⦿ Trigonometric identities of half angles⦿ Sum and difference of trigonometric functions⦿ Trigonometry of right triangles Vectors⦿ Scalar Product of Vectors⦿ Vector Product of Vectors Analytical Geometry 2D⦿ Distance between two points⦿ Circle⦿ Linear equation⦿ Ellipse

Two-dimensional geometric shapes

# Circular segment

 Area $T=\frac{1}{2}\left[r·s-h\left(r-m\right)\right]=\frac{1}{2}{r}^{2}\left({\alpha }_{\left[rad\right]}-sin\alpha \right)$ Arc length $s=r{\alpha }_{\left[rad\right]}=\frac{r{\alpha }_{\left[°\right]}\pi }{180°}$