![]() ![]() The square root of 9 is 3, because 3 x 3 = 9. A square root is the number that, when multiplied by itself, gives the original number.įor example, the square root of 4 is 2, because 2 x 2 = 4. For more on angles and other geometric terms see our pages on Geometry. Similarly, ∠BAC would be used to describe the angle of point A (between points B and C). The expression ∠ABC is used to describe the angle at point B (between points A and C). The angle symbol ∠ is used as shorthand in geometry (the study of shapes) for describing an angle. See our page: Systems of Measurement for more information. On the Fahrenheit scale water freezes at 32☏ and boils at 212☏. Degrees Celsius or Centigrade are used in most of the world (with the exception of the USA). A circle is 360° and a right angle is 90°.
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