The Circle line connects with all TFL "underground" lines.
It does not (directly) connect with the Emirate Air Line (the cable car link between Greenwich and the Docks) and the London Overground (an "outer" circle line around London). (Both of these are marked on the Underground Map, the latter [definitely] operated by TFL.)
The Circle Line Unfortunately this answer is wrong! According to Transport for London the only tube line to connect all London Underground lines is the Jubilee Line.
No they are two separate lines on the London Underground. Circle line is yellow ,Central line is black I think.
Barbican station is on three underground lines. Metropolitan, Circle and Hammersmith & City.
On the London Underground map, the Circle Line is coloured yellow.
The London Subway has 11 lines. Bakerloo line, Central line, Circle line, District line, Hammersmith & City line, Jubilee line, Metropolitan line, Northern line, Piccadilly line, Victoria line and Waterloo & City line.
The section of tube between Edgeware and Farringdon which is now part of both the Circle and Hammersmith & City lines
Green is the District Line
A circle has infinite lines of symmetry, any line going through the center is a line for symmetry.
No, parallel lines are straight lines.
The only line on the London Underground that has interchanges with all other lines is the Circle Line. This line connects with the District, Metropolitan, Hammersmith & City, Bakerloo, Central, Jubilee, and Northern lines at various stations, facilitating easy transfers across the network. It forms a loop around central London, making it a key route for both commuters and tourists.
The diameter of a circle is its line of symmetry and the lines can be infinite
a circle has an infinite amount of symmetrical lines. everywhere you put a line through a circle, it will be symmetrical.