Question

Geometry: Show that two lines are perpendicular

score 137 · Answer 1 · 2026-04-11 15:49:41

137

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Geometry: Show that two lines are perpendicular

Published on 11 Apr 2026 - 15:49

score 153 · Answer 2 · 2026-04-12 02:00:48

153

Views

Is there a quadratic equation in $x$ and $y$ that could represent a circle or a pair of straight lines?

Published on 12 Apr 2026 - 2:00

score 652 · Answer 3 · 2026-04-10 04:54:46

652

Views

Proof of Ptolemy's Theorem

Published on 10 Apr 2026 - 4:54

score 3.8k · Answer 4 · 2026-04-15 03:49:29

3.8k

Views

What values gives the minimum area of the ellipse?

Published on 15 Apr 2026 - 3:49

score 177 · Answer 5 · 2026-04-13 03:47:09

177

Views

How easy is this proof that the circle cannot be squared?

Published on 13 Apr 2026 - 3:47

score 62 · Answer 6 · 2026-04-12 11:48:21

62

Views

Angle Bisectors

Published on 12 Apr 2026 - 11:48

score 77 · Answer 7 · 2026-04-12 09:29:49

77

Views

How can I determine that the center of the circle lies inside the arc?

Published on 12 Apr 2026 - 9:29

score 2.7k · Answer 8 · 2026-04-17 15:38:37

2.7k

Views

If the circle $x^2+y^2+2ax+c=0$ lies completely inside the circle$ x^2+y^2+2 bx+c=0$, prove that$ ab>0,c>0$.

Published on 17 Apr 2026 - 15:38

score 2.3k · Answer 9 · 2026-04-25 10:11:48

2.3k

Views

Finding equation of the circle passing through intersection of given circles and one other point

Published on 25 Apr 2026 - 10:11

score 1k · Answer 10 · 2026-04-15 14:48:05

1k

Views

Why is the area of a circle not $2 \pi R^2$?

Published on 15 Apr 2026 - 14:48

score 1.6k · Answer 11 · 2026-04-15 00:50:16

1.6k

Views

Fitting a circle to a point set with gradient descent algorithm

Published on 15 Apr 2026 - 0:50

score 530 · Answer 12 · 2026-04-14 03:57:17

530

Views

Calculating angle between points on the a circle and on a line at the current angle of the circle

Published on 14 Apr 2026 - 3:57

score 273 · Answer 13 · 2026-04-12 14:19:50

273

Views

Intersection of circles

Published on 12 Apr 2026 - 14:19

score 2.9k · Answer 14 · 2026-04-13 17:24:15

2.9k

Views

Find the equation of the circle whose diameter is a chord.

Published on 13 Apr 2026 - 17:24

score 444 · Answer 15 · 2026-04-17 00:08:55

444

Views

Imagining $S^1$ with antipodal points identified

Published on 17 Apr 2026 - 0:08

List Question

Geometry: Show that two lines are perpendicular

Is there a quadratic equation in $x$ and $y$ that could represent a circle or a pair of straight lines?

Proof of Ptolemy's Theorem

What values gives the minimum area of the ellipse?

How easy is this proof that the circle cannot be squared?

Angle Bisectors

How can I determine that the center of the circle lies inside the arc?

If the circle $x^2+y^2+2ax+c=0$ lies completely inside the circle$ x^2+y^2+2 bx+c=0$, prove that$ ab>0,c>0$.

Finding equation of the circle passing through intersection of given circles and one other point

Why is the area of a circle not $2 \pi R^2$?

Fitting a circle to a point set with gradient descent algorithm

Calculating angle between points on the a circle and on a line at the current angle of the circle

Intersection of circles

Find the equation of the circle whose diameter is a chord.

Imagining $S^1$ with antipodal points identified

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