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2. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   Download as PDF; Printable version ... a fixed aperture and made for an image circle to meet the requirements for ... 1/2.5 converts to 2/5 as a simple fraction, or 0 ...

3. Farey sequence - Wikipedia

   en.wikipedia.org/wiki/Farey_sequence

   With the restricted definition, each Farey sequence starts with the value 0, denoted by the fraction ⁠ 0 / 1 ⁠, and ends with the value 1, denoted by the fraction ⁠ 1 / 1 ⁠ (although some authors omit these terms). A Farey sequence is sometimes called a Farey series, which is not strictly correct, because the terms are not summed. [2]

4. Circle packing - Wikipedia

   en.wikipedia.org/wiki/Circle_packing

   Download as PDF; Printable version; In other projects ... circle packing is the study of the arrangement of circles ... (ratio of 0.6375559772 with packing fraction ...

5. Ford circle - Wikipedia

   en.wikipedia.org/wiki/Ford_circle

   The Ford circle associated with the fraction / is denoted by [/] or [,]. There is a Ford circle associated with every rational number . In addition, the line y = 1 {\displaystyle y=1} is counted as a Ford circle – it can be thought of as the Ford circle associated with infinity , which is the case p = 1 , q = 0. {\displaystyle p=1,q=0.}

6. Unit fraction - Wikipedia

   en.wikipedia.org/wiki/Unit_fraction

   Slices of approximately 1/8 of a pizza. A unit fraction is a positive fraction with one as its numerator, 1/ n.It is the multiplicative inverse (reciprocal) of the denominator of the fraction, which must be a positive natural number.

7. Number Forms - Wikipedia

   en.wikipedia.org/wiki/Number_Forms

   1 ⁄ 7: 0.142... Vulgar Fraction One Seventh 2150 8528 ⅑ 1 ⁄ 9: 0.111... Vulgar Fraction One Ninth 2151 8529 ⅒ 1 ⁄ 10: 0.1 Vulgar Fraction One Tenth 2152 8530 ⅓ 1 ⁄ 3: 0.333... Vulgar Fraction One Third 2153 8531 ⅔ 2 ⁄ 3: 0.666... Vulgar Fraction Two Thirds 2154 8532 ⅕ 1 ⁄ 5: 0.2 Vulgar Fraction One Fifth 2155 8533 ⅖ 2 ...

8. Regular polygon - Wikipedia

   en.wikipedia.org/wiki/Regular_polygon

   The sum of the squared distances from the midpoints of the sides of a regular n-gon to any point on the circumcircle is 2nR 2 − ⁠ 1 / 4 ⁠ ns 2, where s is the side length and R is the circumradius.

9. List of formulas in elementary geometry - Wikipedia

   en.wikipedia.org/wiki/List_of_formulas_in...

   The basic quantities describing a sphere (meaning a 2-sphere, a 2-dimensional surface inside 3-dimensional space) will be denoted by the following variables r {\displaystyle r} is the radius, C = 2 π r {\displaystyle C=2\pi r} is the circumference (the length of any one of its great circles ),