A plane is a flat, two dimensinal surface. A 2d shape is a geometrical figure that can be laid on a plane. Some of the basic 2d shapes are rectangle, square, circle, triangle etc. They can also be termed as flat plan geometrical shapes. They can have a number of sides. This plane geometry section consists a list of calculators that are related with 2-dimensional figures and it will help you to find the area, perimeter, length etc of the the two dimensional shapes.

- Area of an Ellipse Calculator

- Annulus Area Calculator
- Approximate Area of Segment of a Circle Calculator
- Arc Length Calculator
- Area of a Segment of a Circle Calculator
- Area of a Segment of a Circle Calculator
- Area of a Semicircle Calculator
- Area of Inscribed Circle Calculator
- Area of Sector Calculator
- Central Angle of a Circle Calculator
- Chord Length Calculator
- Circle Calc : Find C
- Circle Calculator
- Circumference of Circle Calculator from Radius
- Length of an Arc Calculator
- Perimeter of Sector of Circle Calculator
- Radius of a Circumscribed Circle Calculator
- Radius of an Inscribed Circle in an Octahedron Calculator
- Radius of Circle Calculator
- Radius of Inscribed Circle Calculator
- Radius of Inscribed Circle in an Dodecahedron Calculator
- Radius of Regular Hexagon Circumscribed Circle Calculator
- Sagitta Arc Length Calculator
- Section Modulus of Circle Calculator
- Section Modulus of Circular Tube Calculator
- Segment Height of Circle Calculator
- Segment of a Circle Chord Length Calculator
- Segment of Circle Area Calculator
- Segment of Circle Perimeter Calculator

- Length of a Rectangle Calculator

- Apothem of a Regular Polygon Calculator
- Area of a Hexagon Calculator
- Area of a Regular Hexagon Calculator
- Exterior Angles of a Convex Polygon Calculator
- Exterior Interior Angles of a Convex Polygon Calculator
- Interior Angles of a Convex Polygon Calculator
- Kite Calculator
- Number of Diagonals in a Polygon Calculator
- Perimeter of a Hexagonal Pyramid Calculator
- Perimeter of Octagon Calculator
- Polygon Calculator
- Polygon Centroid Point Calculator
- Polygon Cicumcircle
- Polygon Incircle
- Radius of Icosahedron Calculator
- Regular Hexagon Area Calculator
- Regular Polygon Graphs
- Section Modulus of Diamond Calculator
- Stadium Calculator
- Surface Area of a Dodecahedron Calculator
- Surface Area of an Octahedron Calculator
- Wetted Perimeter of a Trapezoidal Channel Calculator

- Square Calculator

- Area of a Segment of a Circle Calculator
- Gradient of Line in a Plane Calculator
- Heron's Formula Calculator
- Partial Circle Area Calculator
- Radius of a Cylinder Calculator
- Radius of Area Sector Calculator
- Surface Area of Wedge Calculator
- Tiles Calculator
- Triangle Side Length Calculator
- Vertical Angles Calculator
- Wedge Volume Calculator

The 2d shapes are plane geometric figures that has area, but they do not have any thickness. The two dimensional shapes that are formed with lines are termed as polygons.