Tuesday, 14 March 2017

Happy Pi Day!

Pi, Greek letter (π), is the symbol for the ratio of the circumference of a circle to its diameter. Pi Day is celebrated by math enthusiasts around the world on March 14th.
With the use of computers, Pi has been calculated to over 1 trillion digits past the decimal. Pi is an irrational and transcendental number meaning it will continue infinitely without repeating. The symbol for pi was first used in 1706 by William Jones, but was popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737.
There are many ways of celebrating Pi Day. Some of them include eating pie and discussing the relevance of π.
And it's just a coincidence, but it is also Albert Einstein's birthday... So, one more reason to celebrate!
Read here and here on T&L for further information about Pi Day!

Saturday, 4 March 2017

London Bridges

How many bridges are there in London?

Thirty-four bridges span the Thames. The oldest is London Bridge, which was originally made from wood. It was replaced by a stone bridge with shops and houses along its sides.

Lambeth Bridge
Lambeth Bridge is the central bridge of the three bridges in the photograph on the left. Nearest the camera is Westminster Bridge and in the far distance is Vauxhall Bridge. Seen from the London Eye observation wheel.

Tower Bridge
Tower Bridge has stood over the River Thames in London since 1894 and is one of the finest, most recognisable bridges in the World. It is the London bridge you tend to see in movies and on advertising literature for London. Tower Bridge is 60 meters long with towers that rise to a height of 43 meters.

London Bridge is between the City of London and Southwark. It is between Cannon Street Railway Bridge and Tower Bridge. London's original bridge made this one of the most famous bridge in the world. The first London Bridge is thought to have been built by the Romans sometime in the first century, with several rebuilds over the centuries. Throughout its history, London bridge has been a busy thoroughfare, and was once lined with shops. The road over the bridge was only about 4m wide between the shops. It was so narrow it often jammed with people, horses and carts. The present London bridge opened in 1973.

London Bridge
The Millennium Bridge
The Millennium bridge is a pedestrian bridge erected to connect the Tate Modern Art Gallery to the City and St Paul's Cathedral. Almost immediately after opening the bridge had to be shut because of dangerous swaying. It has now been reopened. The bridge is about 320 metres, costs 16 million pounds to build and only takes pedestrians.

Southwark Bridge

Southwark Bridge is a road-bridge linking Southwark and the City across the River Thames. It was designed by Ernest George and Basil Mott and opened in 1921.

Blackfriars Railway Bridge

Blackfriars Railway Bridge is a railway bridge crossing the River Thames between Blackfriars Bridge and the Millennium Bridge.

Westminster Bridge is a road and foot traffic bridge over the River Thames between Westminster and Lambeth. The current bridge opened in 1862, is the second on the site and replaced an earlier bridge that had opened in 1750.

Westminster Bridge