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2. Methods of computing square roots - Wikipedia

   en.wikipedia.org/wiki/Methods_of_computing...

   Learn about different algorithms for approximating the non-negative square root of a positive real number, such as Heron's method, Newton's method, and continued fractions. Compare the accuracy, complexity, and history of various methods, and how to choose a suitable initial estimate.

3. Square root - Wikipedia

   en.wikipedia.org/wiki/Square_root

   Learn what a square root is, how to write it using the radical sign "√", and how it is related to the area of a square. Explore the history of square roots from ancient civilizations to modern mathematics, and the properties and uses of the square root function.

4. Circle packing in a square - Wikipedia

   en.wikipedia.org/wiki/Circle_packing_in_a_square

   Learn about the recreational mathematics problem of packing n unit circles into the smallest possible square. See solutions, formulas, references and related topics.

5. Square root of 2 - Wikipedia

   en.wikipedia.org/wiki/Square_root_of_2

   Learn about the square root of 2, a positive real number that equals the length of a diagonal across a square with sides of one unit. Find out its history, representations, decimal value, and algorithms.

6. Mechanical calculator - Wikipedia

   en.wikipedia.org/wiki/Mechanical_calculator

   Pascal's Calculator or Pascaline was the first mechanical calculator invented by Blaise Pascal in 1642. It was a device that performed the basic operations of arithmetic automatically and helped him in his father's tax collection work.

7. Area of a circle - Wikipedia

   en.wikipedia.org/wiki/Area_of_a_circle

   Learn how to calculate the area of a circle using the formula A = πr2, where r is the radius and π is the constant ratio of the circumference to the diameter. Explore the history, proofs, and properties of this geometric formula.

8. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   Learn about the invention and evolution of electronic calculators, from the first solid-state device in the 1960s to the modern smartphones and PDAs. Compare different models of calculators, such as basic, scientific, graphing, and memory calculators, and their functions and features.

9. Integer square root - Wikipedia

   en.wikipedia.org/wiki/Integer_square_root

   In number theory, the integer square root (isqrt) of a non-negative integer n is the non-negative integer m which is the greatest integer less than or equal to the square root of n, ⁡ = ⌊ ⌋. For example, isqrt ⁡ ( 27 ) = ⌊ 27 ⌋ = ⌊ 5.19615242270663... ⌋ = 5. {\displaystyle \operatorname {isqrt} (27)=\lfloor {\sqrt {27}}\rfloor ...