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  2. Tahrir Square - Wikipedia

    en.wikipedia.org/wiki/Tahrir_Square

    Khedive Ismail. Tahrir Square ( Arabic: ميدان التحرير, romanized : Maydān at-Taḥrīr, Egyptian Arabic pronunciation: [meˈdæːn ettæħˈɾiːɾ]; English: "Liberation Square" ), also known as Martyr Square, is a public town square in downtown Cairo, Egypt. The square has been the location and focus for political demonstrations.

  3. Square wave - Wikipedia

    en.wikipedia.org/wiki/Square_wave

    The square wave is a special case of a pulse wave which allows arbitrary durations at minimum and maximum amplitudes. The ratio of the high period to the total period of a pulse wave is called the duty cycle. A true square wave has a 50% duty cycle (equal high and low periods). Square waves are often encountered in electronics and signal ...

  4. Louisburg Square - Wikipedia

    en.wikipedia.org/wiki/Louisburg_Square

    Louisburg Square. Louisburg Square is a street in the Beacon Hill neighborhood of Boston, Massachusetts, bisected by a small private park. The park is maintained by the Louisburg Square Proprietors. While the Proprietors pay taxes to the City of Boston, the city does not own the park or its garden. Louisburg Square was named for the 1745 Battle ...

  5. Radical symbol - Wikipedia

    en.wikipedia.org/wiki/Radical_symbol

    Radical symbol. In mathematics, the radical symbol, radical sign, root symbol, radix, or surd is a symbol for the square root or higher-order root of a number. The square root of a number x is written as. while the n th root of x is written as. It is also used for other meanings in more advanced mathematics, such as the radical of an ideal .

  6. Nathan Phillips Square - Wikipedia

    en.wikipedia.org/wiki/Nathan_Phillips_Square

    The sign was to be relocated elsewhere at the end of 2015, however on September 13, 2015, it was announced that the sign will remain in the square permanently. The square was the host venue for the closing ceremonies of the 2015 Parapan American Games. Nathan Phillips Square was also a venue for Wheelchair tennis for the 2017 Invictus Games.

  7. Kenmore Square - Wikipedia

    en.wikipedia.org/wiki/Kenmore_Square

    Kenmore Square. Kenmore Square is a square in the Fenway–Kenmore neighborhood of Boston, Massachusetts. It is formed by the crossing of Beacon Street, Commonwealth Avenue, and Brookline Avenue. It is the eastern terminus of U.S. Route 20, the longest U.S. Highway. The Citgo sign is a prominent landmark in Kenmore Square, and Fenway Park is ...

  8. 1989 Tiananmen Square protests and massacre - Wikipedia

    en.wikipedia.org/wiki/1989_Tiananmen_Square...

    1989 Tiananmen Square protests and massacre Part of the Cold War, the Revolutions of 1989 and the Chinese democracy movement Protesters in Tiananmen Square on 2 June (top), and tanks in Beijing in July (bottom) Date Initial protests: 15 April – 4 June 1989 (1 month, 2 weeks and 6 days) Massacre: 4 June 1989; 34 years ago Location Beijing, China and 400 cities nationwide Tiananmen Square 39 ...

  9. Coca-Cola sign - Wikipedia

    en.wikipedia.org/wiki/Coca-Cola_sign

    Coca-Cola sign. The current Times Square Coca-Cola sign undergoing repairs. The Coca-Cola sign is an electro-kinetic sculpture on the Two Times Square building in Times Square, Manhattan, New York City. The current sign, installed in 2017, is 68 feet (21 m) tall and 42 feet (13 m) wide, and is the latest in a line of Coca-Cola Times Square ...

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