Question

Find the circumcentre of a triangle with points $z_1,z_2$ and the origin as its vertices where $z_1,z_2 \in \mathbb{C}$

score 443 · Answer 1 · 2026-03-25 19:32:48

443

Views

Find the circumcentre of a triangle with points $z_1,z_2$ and the origin as its vertices where $z_1,z_2 \in \mathbb{C}$

Published on 25 Mar 2026 - 19:32

score 804 · Answer 2 · 2026-03-25 17:53:12

804

Views

Given a line, find a point on the line which is equidistant from two points A and B

Published on 25 Mar 2026 - 17:53

score 7.7k · Answer 3 · 2026-03-25 02:59:47

7.7k

Views

Find the two missing angles in a quadrilateral

Published on 25 Mar 2026 - 2:59

score 69 · Answer 4 · 2018-04-21 01:45:13

69

Views

Limits / Euclidean geometry of tangent circles

Published on 21 Apr 2018 - 1:45

score 162 · Answer 5 · 2018-04-21 03:43:45

162

Views

Euclidean geometry problem about sum of angles in a square.

Published on 21 Apr 2018 - 3:43

score 361 · Answer 6 · 2018-04-21 13:46:02

361

Views

If $AC=BC$ and $\angle {PAB}=\angle {PBC}$. Prove that $\angle{APM}+\angle{BPC}$=$180°$

Published on 21 Apr 2018 - 13:46

score 216 · Answer 7 · 2026-03-20 09:34:08

216

Views

Intersection of the circles of Apollonius

Published on 20 Mar 2026 - 9:34

score 1k · Answer 8 · 2018-04-22 12:13:00

1k

Views

Determining the radius of a circle knowing an arc length and a distance

Published on 22 Apr 2018 - 12:13

score 147 · Answer 9 · 2018-04-22 12:29:32

147

Views

Finding equation of a plane passing through a point and an intersection of two planes

Published on 22 Apr 2018 - 12:29

score 38 · Answer 10 · 2026-03-25 21:01:36

38

Views

Finding equation of a plane passing though two lines given parametric equations

Published on 25 Mar 2026 - 21:01

score 73 · Answer 11 · 2026-03-25 20:59:54

73

Views

Can this line be parallel with each other?

Published on 25 Mar 2026 - 20:59

score 59 · Answer 12 · 2018-04-25 07:22:50

59

Views

Show that $A'B'$ and $C'D'$ intersect on $AC$, and $A'D'$ and $B'C'$ intersect on $BD$.

Published on 25 Apr 2018 - 7:22

score 140 · Answer 13 · 2018-04-25 07:51:31

Let ABCD be a parallelogram and p any point. Through P draw lines parallel to BC and AB to cut BA and CD in G and H, and AD and BC in E and F.

score 244 · Answer 14 · 2026-03-25 22:30:42

244

Views

Does inscribing a circle, then a triangle, then ..., inside of an initial triangle telescope to some "center" of that triangle?

Published on 25 Mar 2026 - 22:30

score 814 · Answer 15 · 2018-04-25 17:52:01

814

Views

Comparing distances without calculating the actual distance

Published on 25 Apr 2018 - 17:52

List Question

Find the circumcentre of a triangle with points $z_1,z_2$ and the origin as its vertices where $z_1,z_2 \in \mathbb{C}$

Given a line, find a point on the line which is equidistant from two points A and B

Find the two missing angles in a quadrilateral

Limits / Euclidean geometry of tangent circles

Euclidean geometry problem about sum of angles in a square.

If $AC=BC$ and $\angle {PAB}=\angle {PBC}$. Prove that $\angle{APM}+\angle{BPC}$=$180°$

Intersection of the circles of Apollonius

Determining the radius of a circle knowing an arc length and a distance

Finding equation of a plane passing through a point and an intersection of two planes

Finding equation of a plane passing though two lines given parametric equations

Can this line be parallel with each other?

Show that $A'B'$ and $C'D'$ intersect on $AC$, and $A'D'$ and $B'C'$ intersect on $BD$.

Let ABCD be a parallelogram and p any point. Through P draw lines parallel to BC and AB to cut BA and CD in G and H, and AD and BC in E and F.

Does inscribing a circle, then a triangle, then ..., inside of an initial triangle telescope to some "center" of that triangle?

Comparing distances without calculating the actual distance

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