A parallelogram is a quadrilateral with two pairs of parallel sides. The opposite sides of a parallelogram are of equal length and the opposite angles are of equal measure.

- Diagonal of a Rectangle
- Diagonal of a Square
- Surface Area of a Parallelogram
- Surface Area of a Rectangle
- Surface Area of a Square
- Perimeter of a Parallelogram
- Perimeter of a Square
- Volume of a Cube

Any three points, when non-collinear, determine a unique triangle and a unique plane. A triangle has three sides and three angles. The three angles always add to 180°.

- Surface Area of a Triangle
- Surface Area - Heron's Formula
- Perimeter of a Triangle

A circle is the set of all points in a plane that are at a given distance from a given point. It is the curve traced out by a point that moves so that its distance from a given point is constant.

- Surface Area of a Circle
- Area of a Sector of a Circle
- Curved Surface Area of a Sphere
- Perimeter of a Circle
- Volume of a Sphere

A polygon is a plane 2D shape that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain. These segments are called its sides.

- Surface Area (Apothem - Perimeter)
- Surface Area (Apothem - Number of Sides)
- Surface Area (Radius - Number of Sides)
- Surface Area (Length of a Side - Number of Sides)
- Perimeterof a Canonical Polygon

A convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid in American and Canadian English but as a trapezium in English outside North America.

- Surface Area of a Trapezium
- Perimeter of a Trapezium

A rhombus is a simple quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length.

- Surface Area (Side - Height)
- Surface Area (Diagonals)
- Surface Area (Angle)
- Perimeter of Rhombus

A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.

- Slant Height of a Cone
- Total Surface Area (Radius - Height)
- Total Surface Area (Radius - Slant Height)
- Curved Surface Area (Radius - Slant Height)
- Curved Surface Area (Radius - Height)
- Volume of a Cone

A cylinder is one of the most basic curvilinear geometric shapes whose surface is formed by the points at a fixed distance from a given straight line, the axis of the cylinder.

- Curved Surface Area of a Cylinder
- Total Surface Area of a Cylinder
- Volume of a Cylinder

An ellipse is a curve on a plane that surrounds two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.

- Surface Area of Ellipse
- Perimeter of Ellipse
- Volume of Ellipsoid

Analytic geometry is the study of geometry using a coordinate system. It is frequently used in physics and engineering, and is the foundation of most modern fields of geometry.

- Distance Between 2 points (x,y)
- Distance Between 2 points (x,y,z)
- Slope of a Line

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