Plane Geometry (2D)
A plane, in relation to mathematics, is a flat two-dimensional surface. A plane is the two-dimensional analogue of a point (zero dimensions), a line (one dimension) and three-dimensional space. Planes can arise as subspaces of some higher-dimensional space, as with the walls of a room, or they may enjoy an independent existence in their own right, as in the setting of Euclidean geometry.
Many fundamental tasks in mathematics, geometry, trigonometry, graph theory and graphing are performed in a two-dimensional space, or in other words, in the plane.
Parent Categories
Plane Geometry (2D) Calculators and Collections
Plane Geometry (2D) Equations
- Adjacent Side - Pythagorean Theorem Use Equation
- Angle From Law of Sines Use Equation
- Angle of a Circle Arc from Radius and Chord Depth Use Equation
- Arc Length from Chord Length and Radius Use Equation
- Area of a Circle Use Equation
- Area of a Circle Use Equation
- Area of a Circle Arc Segment Use Equation
- Area of a Polygon Use Equation
- Area of a regular polygon (given apothem & number of sides) Use Equation
- Area of a regular polygon (given perimeter & number of sides Use Equation
- Area of a Square Use Equation
- Area of a Trapezium Use Equation
- Area of Circle Around a Triangle Use Equation
- Area of Circle Within a Triangle Use Equation
- Area of Circular Annulus Use Equation
- Area of Equilateral Triangle Use Equation
- Area of Regular Polygon [apothem, number of sides] Use Equation
- Area of Regular Polygon [perimeter, number of sides] Use Equation
- Area of Semicircle Use Equation
- Area of semicircle with diameter Use Equation
- Area of Triangle (base and height) Use Equation
- Area of Triangle (three points) Use Equation
- Area of Triangle (three sides) Use Equation
- Area of Triangle (two sides and interior angle) Use Equation
- Area Unit Conversion Use Equation
- Ballistic Flight Parabolic Equation Use Equation
- Chord Length Use Equation
- Chord Length from Arc Length and Radius Use Equation
- Circle - Area f(Circumference) Use Equation
- Circle - Area f(diameter) Use Equation
- Circle - area of an arc sector Use Equation
- Circle - area of an arc segment Use Equation
- Circle - area of arc Use Equation
- Circle - area of sector Use Equation
- Circle - radius Use Equation
- Circle - radius around triangle Use Equation
- Circle - Radius from Area Use Equation
- Circle - radius in triangle Use Equation
- Circle Chord Length from Angle and Radius Use Equation
- Circle Circumference Use Equation
- Circle Diameter from Area Use Equation
- Circle Equation from Center and one Point Use Equation
- Circle Radius from Circumference Use Equation
- Circle Radius-to-Side of Square Use Equation
- Circle with Center on Y-axis Use Equation
- Circle with the Same Area as an Ellipse Use Equation
- Circle with the Same Perimeter as an Ellipse Use Equation
- Circle- Circumference f(Area) Use Equation
- Decagon Area Use Equation
- Diagonal of a Square Use Equation
- Distance between two points Use Equation
- Distance Division Use Equation
- Dodecagon Area Use Equation
- Eccentricity Use Equation
- Ellipse - circumference (apx 3) Use Equation
- Ellipse - circumference (apx1) Use Equation
- Ellipse - circumference (apx2) Use Equation
- Ellipse - circumference (apx3) Use Equation
- Ellipse - Linear Eccentricity Use Equation
- Ellipse Area Use Equation
- Ellipse Axes-to-Circle Radius Use Equation
- Ellipse Axis Length Use Equation
- Equilateral Triangle Area Use Equation
- Equilateral Triangle Volume Use Equation
- Golden Rectangle Use Equation
- Hausdorff Dimension Use Equation
- Height of Triangle Use Equation
- Hendecagon Area Use Equation
- Heptagon Area Use Equation
- Hexagon Area Use Equation
- Hexagon Side Length from Area Use Equation
- Hypotenuse - Pythagorean Theorem Use Equation
- Interpolation Use Equation
- Length Conversion Use Equation
- Length of Circle Arc Use Equation
- Length of Equilateral Triangle Sides Use Equation
- Length Units Conversion Use Equation
- Linear Equation Use Equation
- mid-point between two points Use Equation
- Nonagon Area Use Equation
- Octagon Area Use Equation
- Octagon Radius from Area Use Equation
- Octagon Radius from Side Length Use Equation
- Octagon Side from Area Use Equation
- Octagon Side Length from Radius Use Equation
- Octagon Side Length in a Square Use Equation
- Parabola Use Equation
- Parabola Arc Length Use Equation
- Parabola Area Use Equation
- Parabolic Area (Concave) Use Equation
- ParabolicArcArea Use Equation
- Parallelogram - area1 Use Equation
- Parallelogram - area2 Use Equation
- Parallelogram - perimeter Use Equation
- Pentadecagon Area Use Equation
- Pentagon Area Use Equation
- Perimeter of a Polygon from Number and Length of Sides Use Equation
- Polygon - area2 Use Equation
- Polygon - area3 Use Equation
- Polygon - area4 Use Equation
- Polygon - Circumference f(n,A) Use Equation
- Polygon - perimeter2 Use Equation
- Polygon Perimeter from Inner Radius and Number of Sides Use Equation
- Polygon Side Length from Area Use Equation
- Polygon Side within a Circle Use Equation
- Quadrilateral Area from Sides and Angles Use Equation
- Quadrilateral Area from Sides and Diagonal Use Equation
- Quadrilateral Perimeter Use Equation
- Quadrilateral Semi-Perimeter Use Equation
- Radius of a Circle around a Polygon Use Equation
- Radius of Circle from Chord Length and Arc Height Use Equation
- Radius of Circle within a Polygon Use Equation
- Radius of Displaced Circle Use Equation
- Range to Base Use Equation
- Rectangle Area Use Equation
- Rectangle Diagonal Use Equation
- Rectangle Perimeter Use Equation
- Regular Polygon Interior Angle Use Equation
- Side - Pythagorean Theorem Use Equation
- Square Footage of a Triangle (base and height) Use Equation
- Square Footage of a Triangle (three sides) Use Equation
- Square Perimeter Use Equation
- Sum of Two Angles Use Equation
- Tangent-Secant Theorem Use Equation
- Trapezoid Area Use Equation
- Trapezoid Perimeter Use Equation
- Triangle (Rt.) - cos(θ) Use Equation
- Triangle (Rt.) - sin(θ) Use Equation
- Triangle (Rt.) - tan(θ) Use Equation
- Triangle - Angle Use Equation
- Triangle Area from Two Angles and Interior Side Use Equation
- Triangle Perimeter Use Equation
- Triangle semi-Perimeter Use Equation
- Triangle Side Length Use Equation
- Triangle Third Side Use Equation
- Width of a Rectangle Use Equation
- Width of Triangle Use Equation
- cosθ=Δx|Δr| Use Equation
- Δx=|Δr|⋅cosθ Use Equation
- Δy=|Δr|⋅sinθ Use Equation
- Δxt=Δx1+Δx2 Use Equation
- Δyt=Δy1+Δy2 Use Equation
- sinθ=Δy|Δr| Use Equation
- θ=cos-1(ˆA⋅ˆB) Use Equation
- →A⋅→B Use Equation
- →A+→B Use Equation
- →A-→B Use Equation
- |r|=√Δx2+Δy2 Use Equation
- |→A+→B| Use Equation
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