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Geometry Formulas for Polygons

Right Triangle

Right triangle - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe  (Pythagorean)

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Equilateral Triangle

Equilateral triangle - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Rectangle

Rectangle - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Parallelogram

Parallelogram - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

General Quadrilateral

General quadrilateral - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

    Geometry Formula - RF Cafe

Geometry Formula - RF Cafe  (Bretschneider's Formula)

Geometry Formula - RF Cafe

Cyclic-Inscriptable Quadrilateral

Cyclic inscriptable quadrilateral - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

General Triangle

General triangle - RF CafeGeometry Formula - RF Cafe

hc = length of altitude on side c,

tc = length of bisector of angle C,

mc = length of median to side c.

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe (Law of Cosines)

Geometry Formula - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe (Heron's formula)

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

The following symbols are used in these polygon formulas:

    K = area

    r= radius of inscribed circle

    R = radius of circumscribed circle

    p and q are diagonals

    n= number of sides

    θ = one of the vertex angles

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Polygon

A polygon is a two-dimensional geometric figure that is formed by connecting a sequence of straight line segments to create a closed shape. The segments are called sides, and the points where the sides intersect are called vertices. Polygons can have any number of sides, but they must have at least three sides.

The word "polygon" has its origins in the Greek words πολύς ("many") and γωνία (gōnia), meaning "knee" or "angle."

Polygons are classified based on the number of sides they have:

Triangles: Triangles are polygons with three sides and three vertices. They are further classified into:

Equilateral triangle: All three sides are equal in length. Isosceles triangle: Two sides are equal in length. Scalene triangle: All three sides have different lengths. Right triangle: One angle is a right angle (90 degrees). Quadrilaterals: Quadrilaterals are polygons with four sides and four vertices. They include:

Square: All four sides are equal in length, and all angles are right angles. Rectangle: Opposite sides are equal in length, and all angles are right angles. Parallelogram: Opposite sides are parallel and equal in length. Rhombus: All sides are equal in length. Trapezoid (or trapezium): One pair of opposite sides is parallel. Pentagons: Pentagons have five sides and five vertices.

Hexagons: Hexagons have six sides and six vertices.

Heptagons: Heptagons have seven sides and seven vertices.

Octagons: Octagons have eight sides and eight vertices.

And so on...

Polygons can also be classified as regular or irregular. Regular polygons have all sides and angles equal in measure, while irregular polygons have sides and/or angles of different lengths or measures.

The sum of the interior angles of any polygon can be found using the formula: (n-2) * 180 degrees, where n is the number of sides.


This content was generated by the ChatGPT artificial intelligence (AI) engine. Some review was performed to help detect and correct any inaccuracies; however, you are encouraged to verify the information yourself if it will be used for critical applications. In some cases, multiple solicitations to ChatGPT were used to assimilate final content. Images and external hyperlinks have also been added occasionally. Courts have ruled that AI-generated content is not subject to copyright restrictions, but since I modify them, everything here is protected by RF Cafe copyright. Your use of this data implies an agreement to hold totally harmless Kirt Blattenberger, RF Cafe, and any and all of its assigns. Thank you. Here are the major categories.

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 Source: CRC Standard Math Tables, 1987

Rhombus

Rhombus - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Trapezoid

Trapezoid - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe 

Regular Polygon

Regular polygon - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

    Geometry Formula - RF Cafe

   Geometry Formula - RF Cafe

Geometry Formula - RF Cafe 

Cyclic Quadrilateral

Cyclic quadrilateral - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe   (Brahmagupta's formula)

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe 

Axiom Test Equipment - RF Cafe
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