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- Three circles are mutually externally tangent. Two of the circles have radii <math>3</math> and <math>7</math>. If the area of the triangle f795 bytes (129 words) - 10:22, 4 April 2012
- Circles <math>\omega_1</math> and <math>\omega_2</math> are centered on opposite si Let <math>r_1</math> and <math>r_2</math> be the radii of circles <math>\omega_1</math> and <math>\omega_2</math> respectively.3 KB (563 words) - 02:05, 25 November 2023
- ...ent to the hypotenuse and to the extension of leg <math>CB</math>, and the circles are externally tangent to each other. The length of the radius of either c7 KB (1,218 words) - 15:28, 11 July 2022
- ...to the hypotenuse and to the extension of [[leg]] <math>CB</math>, and the circles are externally tangent to each other. The length of the radius either circ ...tangents is <math>2.4x</math>. Note that if we connect the centers of the circles we have a rectangle with sidelengths 8x and 4x. So, <math>8x+2.4x+x=34</mat11 KB (1,851 words) - 12:31, 21 December 2021
- Circles <math> \displaystyle S_1 </math> and <math> \displaystyle S_2 </math> inter ...stay fixed, at half the measure of arc <math> \displaystyle QP </math> on circles <math> \displaystyle S_1 </math> and <math> \displaystyle S_2 </math>, resp3 KB (470 words) - 07:32, 28 March 2007
- ...and <math>O_C</math>. Let the center of the circle tangent to those three circles be <math>O</math>. The [[homothety]] <math>\mathcal{H}\left(I, \frac{4-r}{4 ...h>, <math>B'</math>, <math>C'</math>, and <math>O</math> be the centers of circles <math>\omega_{A}</math>, <math>\omega_{B}</math>, <math>\omega_{C}</math>,11 KB (2,099 words) - 17:51, 4 January 2024
- 9 KB (1,435 words) - 01:45, 6 December 2021
- ...e with radius greater than <math>\frac{1}{\sqrt{2}}</math> between those 3 circles. ...ath> must decrease in radius. Hence it is sufficient to consider 3 tangent circles. By lemma 1, there is always a circle of radius greater than <math>\frac{1}5 KB (754 words) - 03:41, 7 August 2014
- ...and <math>Q_{A}</math> lie on <math>AO</math> since for a pair of tangent circles, the point of tangency and the two centers are [[collinear]].7 KB (1,274 words) - 15:11, 31 August 2017
- Circles <math>\omega_{1}</math> and <math>\omega_{2}</math> intersect at <math>P</m3 KB (519 words) - 20:59, 24 May 2007
- ...ath> be positive integers. There are given <math> \displaystyle n </math> circles in the plane. Every two of them intersect at two distinct points, and all ...rcles a distinct color, which we use for both points common to the pair of circles.5 KB (861 words) - 10:05, 5 June 2007
- '''Lemma.''' Let <math> \displaystyle \omega_1 , \omega_2 </math> be two circles with centers <math> \displaystyle O_1, O_2 </math>, and common points <math10 KB (1,539 words) - 23:37, 6 June 2007
- ...The curved parts of the band add up to a full circumference of one of the circles, so their sum is <math>20\pi\,\mathrm{ cm}</math>. The total length of the1 KB (175 words) - 22:21, 23 July 2020
- '''Lemma.''' Let <math>\omega_1, \omega_2 </math> be two circles which intersect at <math>M, N </math>, let <math>AB </math> be a chord of <4 KB (712 words) - 21:57, 25 April 2020
- Because two different circles intersect in at most two points, any polygon can be inscribed in at most on2 KB (291 words) - 05:30, 16 August 2011
- ...ent of both circles that intersects the segment joining the centers of two circles. ...ommon internal tangent line | common internal tangent]] [[intersect]]s the circles at <math>C</math> and <math>D</math>, respectively. [[Line]]s <math>AB</mat703 bytes (106 words) - 16:23, 10 March 2019
- 3 KB (553 words) - 10:45, 26 August 2015
- Circles <math> \mathcal{C}_1, \mathcal{C}_2, </math> and <math> \mathcal{C}_3 </mat8 KB (1,350 words) - 12:00, 4 December 2022
- The larger circle has radius 12 cm. Each of the six identical smaller circles smaller circles?9 KB (1,449 words) - 20:49, 2 October 2020
- ...otated in the plane, they are different from one another. At most how many circles are painted with all three colors?11 KB (1,738 words) - 19:25, 10 March 2015