Octagon

In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, "eight angles") is an eight-sided polygon or 8-gon.

A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges. A truncated octagon, t{8} is a hexadecagon, t{16}.

Properties of the general octagon

The sum of all the internal angles of any octagon is 1080°. As with all polygons, the external angles total 360°.

If squares are constructed all internally or all externally on the sides of an octagon, then the midpoints of the segments connecting the centers of opposite squares form a quadrilateral that is both equidiagonal and orthodiagonal (that is, whose diagonals are equal in length and at right angles to each other).

The midpoint octagon of a reference octagon has its eight vertices at the midpoints of the sides of the reference octagon. If squares are constructed all internally or all externally on the sides of the midpoint octagon, then the midpoints of the segments connecting the centers of opposite squares themselves form the vertices of a square.

UCL Main Building

The Main Building at University College London, includes the Octagon, Quad, Cloisters, Main Library, Flaxman Gallery and the Wilkins Building. The North Wing, South Wing, Chadwick Building and Pearson Building are also considered part of the main UCL building.

History

In 1827, a year after the founding of UCL, construction of the Main Building began on the site of the old Carmarthen Square. The Octagon Building is a term used for the whole of the Main Building, but more appropriately for a central part of it. At the centrepiece of the building is an ornate dome, which is visible throughout the immediate area. The Octagon was designed by the Architect William Wilkins, who also designed the National Gallery. The original plans by Wilkins called for a U-shaped enclosure around the Quad (square). Funds, however, ran out in 1829 with only the Portico and Dome finished. Wilkins original plans were not to be completed until the 20th century: The Main Building was finally finished in 1985, 158 years since the foundations were laid, with a formal opening ceremony by Queen Elizabeth II of the United Kingdom.

Octagon (Dilate album)

Octagon is the second studio album by Dilate, released on June 24, 1997 by Hypnotic Records.

Track listing

All music composed by Victor Wulf.

Personnel

Adapted from the Octagon liner notes.

Release history

References

Ria (singer)

Ria is a New Zealand R&B/pop singer. She is best known for her singles Over You and All My Ladies. She attended Auckland Girls Grammar School.

RIA started performing at a young age before progressing in her teens to leading an all-girl band "Vivah" to becoming winners of the national Smokefree Pacifica Beats in 2007. RIA is a graduate from the Music & Audio Institute of NZ (MAINZ) and singing tutor at the Otara Music Centre (OMAC).

Discography

Singles

References

Research Institute for Aquaculture No 1

Research Institute for Aquaculture No 1, or RIA1, is a government organization under the Fisheries Ministry of Vietnam. RIA1 is responsible for carrying out basic and applied research programs for inland, coastal, and marine aquaculture, including involvement in planning and development activities. RIA1 is now considered a national multifunction institute dealing with research, education, and extension in aquaculture and aquatic resources management. The Institute also plays an advisory role for many other aquaculture development projects.

External links

RIA (Red de Innovación y Aprendizaje)

The RIA (Red de Innovación y Aprendizaje), or Leaning and Innovation Network, is a group of education centers that offer members of underserved communities in Mexico access to computers, the Internet and quality education. The RIA is overseen by Fundación Proacceso, a Mexico-based non-profit organization focused on using technology as a tool for education.

Background

The first RIA center was inaugurated on May 18, 2009, and since then over 68,000 users have registered at its ten centers. Thirty-two new RIA centers will open by the end of January 2011, bringing the network to a total of 42 centers.

The RIA offers courses on basic computer and Internet skills, English, finding work through the Internet, math and science workshops for children, personal finance and more. Students can also obtain their high school, bachelor’s and master’s degrees at the RIA through the Institute of Online education. Courses are taught by qualified facilitators, many of whom are residents of the local communities that the RIA targets.