Apollonius's theorem is a result in geometry that relates the lengths of the sides of a triangle to the length of a median. Specifically, the theorem states that in any triangle, the square of the length of a median is equal to the average of the squares of the lengths of the two sides that the median divides, minus one-fourth the square of the length of the third side.
In mathematics, particularly in geometry, a "disk" (or "disc") refers to a two-dimensional shape that is defined as the region in the plane that is enclosed by a circle. The term can have slightly different meanings depending on the context: 1. **Closed Disk**: This includes all the points inside a circle as well as the points on the boundary (the circumference of the circle).
Euclid's "Elements" is a comprehensive mathematical work composed by the ancient Greek mathematician Euclid around 300 BCE. It is one of the most influential works in the history of mathematics and serves as a foundational text in geometry. The "Elements" consists of 13 books that cover various topics in mathematics, including: 1. **Plane Geometry**: The first six books focus on the properties of plane figures, such as points, lines, circles, and triangles.
Rotation generally refers to the action of turning around a center or an axis. The term can be applied in various contexts, including: 1. **Physics**: In physics, rotation is the circular movement of an object around a center (or point) of rotation. For instance, Earth rotates on its axis, which leads to the cycle of day and night.
The term "Zone theorem" can refer to different concepts depending on the field of study. In mathematics and related areas, it can involve concepts related to topology, geometry, or other branches. However, one possible interpretation could involve concepts within geometry, particularly in the context of tessellations or partitioning space.
Spiral similarity is a concept often used in geometry and mathematics that refers to a type of similarity transformation involving rotation and scaling. Specifically, two shapes (often in a two-dimensional space) are said to be spiral similar if one can be obtained from the other through a combination of the following transformations: 1. **Scaling**: One shape can be enlarged or reduced in size while maintaining its shape.
Brianchon's theorem is a result in projective geometry concerning hexagons and conics. It states that if a hexagon is inscribed in a conic section (like an ellipse, parabola, or hyperbola) and the opposite sides of the hexagon are extended to meet, then the three intersection points of these extended lines will be collinear. More formally, consider a hexagon \( ABCDEF \) inscribed in a conic.
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.
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 Quadratrix of Hippias is a curve that was introduced by the ancient Greek philosopher Hippias of Elis around the 5th century BCE. This curve is notable for its historical significance in attempts to solve the problem of squaring the circle, which involves finding a square that has the same area as a given circle using only a finite number of steps with a compass and straightedge. The Quadratrix is constructed using a combination of geometric methods, particularly involving angles and arcs.
The 1979 Fastnet Race was a notable yacht race that took place from August 11 to August 14, 1979, as part of the biennial Fastnet Race organized by the Royal Ocean Racing Club (RORC) in the United Kingdom. The race starts from Cowes on the Isle of Wight and involves a challenging course around the Fastnet Rock off the southwest coast of Ireland, before returning to Plymouth.
"Anne of Denmark and Contrary Winds" refers to a historical context involving Anne of Denmark, who was the queen consort of James VI of Scotland and later James I of England. She was a significant figure in the early 17th century, known for her involvement in politics, the arts, and her patronage of the theatre. The phrase "contrary winds" could refer to a range of meanings.
Hurricane Bawbag was a significant weather event that affected parts of the UK in December 2011. It was known for its high winds and heavy rain, which caused disruption across various regions, particularly Scotland. The name "Bawbag" is a colloquial Scottish term, often used humorously, and its use in naming the storm was met with both amusement and criticism. The storm brought down trees, disrupted transportation, and caused power outages for many residents.
As of my last update in October 2023, there was no widely recognized weather event or storm named "Cyclone Per." It is possible that it could refer to a specific weather system that developed after that date or it may be a less commonly known cyclone that did not gain significant media attention. Cyclones, also known as hurricanes or typhoons depending on their location, are named according to lists maintained by meteorological organizations, and names are reused over time.
Hurricane Ophelia was a powerful and unusual Atlantic hurricane that occurred in October 2017. Here are some key details about it: 1. **Formation and Path**: Ophelia formed on October 9, 2017, and initially became a tropical storm before quickly intensifying into a hurricane. It achieved hurricane status on October 11 and reached peak winds of 115 mph (185 km/h) on October 14.
Fluid Construction Grammar (FCG) is a theoretical framework in the field of computational linguistics and cognitive science that emphasizes the fluid, dynamic nature of language use and understanding. It was developed by researchers including Luc Steels and is part of a broader effort to model how humans acquire, use, and process language. Key features of Fluid Construction Grammar include: 1. **Construction-based approach**: FCG is grounded in the idea that language consists of constructions—patterns that pair forms with meanings.
Storm Dennis was a significant weather event that affected parts of the United Kingdom and Ireland in February 2020. It was classified as a powerful Atlantic storm that brought heavy rainfall, strong winds, and widespread flooding to various regions. The storm followed closely on the heels of Storm Ciara, which had already caused damage earlier in the same month. Storm Dennis resulted in multiple weather warnings, with some areas experiencing severe flooding, road closures, and disruptions to public transportation.
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 3. Visual Studio Code extension installation.Figure 4. Visual Studio Code extension tree navigation.Figure 5. Web editor. 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.Video 4. OurBigBook Visual Studio Code extension editing and navigation demo. Source. - Infinitely deep tables of contents:
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





