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  • Let <math>{\cal C}_1</math> and <math>{\cal C}_2</math> be concentric circles, with <math>{\cal C}_2</math> in the interior of <math>{\cal C}_1</math>.
    4 KB (656 words) - 17:26, 20 June 2019
  • ...ass through <math>R</math> and <math>S</math>, so the radical axis of both circles is <math>RS</math>. Hence, <math>A</math> lies on <math>RS</math>, which i
    4 KB (613 words) - 20:50, 19 December 2023
  • ...us of a third circle that is tangent to one line and tangent to both other circles?
    5 KB (837 words) - 12:22, 27 May 2012
  • ...</math> must lie on circle <math> X </math>. We now want the area between circles <math> X </math> and <math> Y </math>. Let <math> M </math> be the midpoint First, let's try to find the radii of the circles. <math> \angle AYB=30^\circ\implies \angle AYM=15^\circ </math>. From the h
    4 KB (622 words) - 15:07, 28 May 2012
  • Two equal circles in the same plane cannot have the following number of common tangents.
    23 KB (3,556 words) - 15:35, 30 December 2023
  • ...ric circles. It is <math>10</math> feet wide. The circumference of the two circles differ by about: The diameters of two circles are <math>8</math> inches and <math>12</math> inches respectively. The rati
    21 KB (3,123 words) - 14:24, 20 February 2020
  • ...rline{AB}</math> is divided at <math>C</math> so that <math>AC=3CB</math>. Circles are described on <math>\overline{AC}</math>
    23 KB (3,535 words) - 16:29, 24 April 2020
  • The ratio of the areas of two concentric circles is <math>1: 3</math>. If the radius of the smaller is <math>r</math>, then
    22 KB (3,509 words) - 21:29, 31 December 2023
  • The following figures are composed of squares and circles. Which figure has a shaded region with largest area? ...f{B}</math> the area of the shaded region is the sum of the areas of the 4 circles subtracted from the area of the square. That is <math>2^2-4 \left( \left(
    3 KB (433 words) - 10:40, 14 June 2024
  • ...circles with radius 2 are mutually tangent. What is the total area of the circles and the region bounded by them, as shown in the figure? ...find the area of this triangle to include the figure formed in between the circles. Since the equilateral triangle has two 30-60-90 triangles inside, we can f
    4 KB (675 words) - 03:58, 23 January 2023
  • Two distinct circles <math>K_1</math> and <math>K_2</math> are drawn in the plane. They intersec
    3 KB (500 words) - 19:00, 23 October 2019
  • ...center of the circle using two chords). The intersection point of the two circles other than X is the center of spiral similarity, and hence is O, which repr
    4 KB (712 words) - 21:57, 12 November 2023
  • Two circles that share the same center have radii <math>10</math> meters and <math>20</
    14 KB (2,035 words) - 15:23, 26 January 2024
  • ...e with radius <math> 2 </math>, meaning that the total area of the quarter circles is <math> 4\pi </math>. The area of the square is <math> 16 </math>. Thus,
    2 KB (310 words) - 16:18, 10 November 2023
  • The area also includes <math>4</math> circular segments. Two are quarter-circles centered at <math>P</math> of radii <math>\sqrt{2}</math> (the segment boun
    4 KB (603 words) - 16:51, 3 April 2020
  • Let <math>J</math> be the three circles radical center, meaning <math>JX</math> and <math>JZ</math> are tangent seg
    3 KB (524 words) - 16:08, 11 July 2018
  • Two circles are externally tangent. Lines <math>\overline{PAB}</math> and <math>\overli
    16 KB (2,451 words) - 04:27, 6 September 2021
  • ...ath>, while the other is centered at <math>B</math>. The equations of the circles are:
    8 KB (1,268 words) - 14:10, 31 January 2024
  • If <math>\Delta ABD</math> is acute, prove that the four circles of radius <math>1</math> with centers <math>A</math>, <math>B</math>, <math ...th of <math>a</math> must not exceed 2 (the radius for each circle) or the circles will not meet and thus not cover the parallelogram.
    2 KB (360 words) - 00:10, 10 December 2022
  • *Three concentric circles have radii <math>3,</math> <math>4,</math> and <math>5.</math> An equilater
    3 KB (432 words) - 23:22, 13 January 2021

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