The "Power of a Point" theorem is a fundamental concept in geometry, particularly in the study of circles. It provides a relationship between the distances from a point to a circle and various segments created by lines related to that circle.
The Poncelet–Steiner theorem is a result in projective geometry that pertains to the construction of geometric figures using a limited set of tools: typically a compass and a straightedge.
A polygon with holes, often referred to as a "polygonal region" or "complex polygon," is a type of geometric figure that consists of a main outer polygon and one or more inner polygons (the holes) that are not part of the area of the main polygon. Here are some key aspects of polygons with holes: 1. **Structure**: The outer boundary is a simple polygon, while the holes are usually also simple polygons that are entirely enclosed by the outer boundary.
Polygon is a protocol and framework for building and connecting Ethereum-compatible blockchain networks. It seeks to address some of the scalability issues faced by the Ethereum network by enabling the creation of Layer 2 scaling solutions. Originally known as Matic Network, it rebranded to Polygon in early 2021.
In mathematics and physics, the terms "pole" and "polar" can refer to different concepts depending on the context. Here are a few key meanings: ### In Geometry: 1. **Pole**: - In spherical geometry, a pole usually refers to the topmost point of a sphere or a point on a sphere that is opposite to the equator.
The plastic number is a mathematical constant that serves as the unique real solution to the equation \( x^3 = x + 1 \). It is denoted by the Greek letter \( \mu \) (mu) and is approximately equal to 1.3247179. The plastic number arises in various contexts, particularly in the study of growth patterns and recursive sequences.
The term "Philo line" can refer to different concepts depending on the context, but it's most commonly associated with the study of religion, philosophy, or social theory. It may relate to the works of Philo of Alexandria, a Hellenistic Jewish philosopher whose ideas blended Jewish theology with Greek philosophy. In another context, "Philo" might refer to a specific concept or line of thought in philosophical discussions or literature.
Pasch's Axiom is a fundamental statement in geometry that addresses the relationship between points and lines. It is often discussed in the context of projective geometry and can be expressed in the following way: If a line intersects one side of a triangle (formed by three points) and does not pass through any of the triangle's vertices, then it must also intersect one of the other two sides of the triangle.
Pappus's hexagon theorem is a result in projective geometry named after the ancient Greek mathematician Pappus of Alexandria. The theorem states that if you have a hexagon inscribed in two lines (i.e., pairs of opposite vertices of the hexagon lie on each of the two lines), the three pairs of opposite sides of the hexagon, when extended, will meet at three points that are collinear (lie on a straight line).
Pappus's area theorem, also known as Pappus's centroid theorem, is a fundamental result in geometry concerning the surface area of a solid of revolution. The theorem states that the surface area \( A \) of a solid formed by revolving a plane figure about an external axis (that is not intersecting the figure) is equal to the product of the length of the path traced by the centroid of the figure and the area of the figure itself.
A nine-point conic is a relevant concept in projective geometry, particularly in relation to conic sections. Specifically, a nine-point conic relates to a configuration of points derived from a triangle. Given a triangle, the nine-point conic is defined using several key points: 1. The midpoints of each side of the triangle (3 points). 2. The feet of the altitudes from each vertex to the opposite side (3 points).
Neusis construction is a method used in classical geometry to create specific geometric figures and solve problems, particularly in the context of angle trisection and the construction of certain types of polygons. The term "neusis" comes from the Greek word for "to incline" or "to lean," as the construction involves using a marked straightedge (a ruler marked with specific lengths) to achieve the desired geometric outcome.
"Napoleon's problem" typically refers to a well-known geometrical problem in mathematics, specifically in the context of triangle geometry.
The mixtilinear incircle of a triangle is a special circle associated with a triangle, particularly in relation to its vertices and its incircle. For a given triangle \( ABC \), the mixtilinear incircle pertaining to a vertex, say \( A \), is the circle that is tangent to: 1. The incircle of triangle \( ABC \), 2. The arc \( BC \) of the circumcircle of triangle \( ABC \) that does not contain the vertex \( A \).
Menelaus's theorem is a fundamental result in geometry, specifically in the study of triangles and transversals. It relates to the collinearity of points defined by a triangle and a line that intersects its sides.
A k-uniform tiling refers to a type of tiling in which each tile is identical and has a fixed shape, and the tiling is assembled in a way such that every region or area of the space is covered by these tiles without gaps or overlaps. In a k-uniform tiling, the arrangement of the tiles is such that each vertex has the same number of tiles meeting at it, which corresponds to the parameter k.
The Japanese Theorem, also known as the "Theorem of Japanese" or "Japanese Theorem for Cyclic Quadrilaterals," refers to a specific result in geometry concerning cyclic quadrilaterals.
The Japanese theorem, also known as the theorem of the cyclic polygon, is a result in geometry concerning the properties of cyclic polygons (polygons whose vertices lie on the circumference of a single circle).

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact