Question

Let H be the orthocenter of the sharp triangle ABC

score 139 · Answer 1 · 2020-03-29 11:46:27

139

Views

Let H be the orthocenter of the sharp triangle ABC

Published on 29 Mar 2020 - 11:46

score 38 · Answer 2 · 2026-03-25 20:40:14

38

Views

Can we find $\lambda$ with $B(\lambda, |\lambda|) \subseteq K?$

Published on 25 Mar 2026 - 20:40

score 114 · Answer 3 · 2020-03-29 14:10:12

114

Views

What is the transformation set?

Published on 29 Mar 2020 - 14:10

score 73 · Answer 4 · 2020-03-30 08:01:26

73

Views

A "jeopardy" with common tangents of two hyperbolas

Published on 30 Mar 2020 - 8:01

score 74 · Answer 5 · 2020-03-30 11:17:55

74

Views

Point for minimum distance

Published on 30 Mar 2020 - 11:17

score 264 · Answer 6 · 2020-03-30 11:55:06

264

Views

Show that the line $x+y=q$ intersects the ellipse $x^2-2x+2y^2=3$ at two different points if $q^2<2q+5$

Published on 30 Mar 2020 - 11:55

score 73 · Answer 7 · 2026-03-26 19:19:40

73

Views

What is a geometric interpretation of $0x+0y=0$

Published on 26 Mar 2026 - 19:19

score 105 · Answer 8 · 2026-03-30 06:50:12

105

Views

Why do we need the concept of pair of straight lines?

Published on 30 Mar 2026 - 6:50

score 104 · Answer 9 · 2026-03-31 13:36:40

104

Views

On $xOy$ plane, what is the equation of the vertical line passing through $(x,0)$?

Published on 31 Mar 2026 - 13:36

score 26 · Answer 10 · 2020-04-01 06:32:54

26

Views

Equations of the points

Published on 01 Apr 2020 - 6:32

score 303 · Answer 11 · 2020-04-01 07:34:37

303

Views

Show that when $p$ varies, the midpoint of $PR$ lies on the curve $y^2=2x-4$.

Published on 01 Apr 2020 - 7:34

score 306 · Answer 12 · 2020-04-01 10:25:04

306

Views

Prove that the midpoint of PQ lies on the straight line $y+r^2x=0$.

Published on 01 Apr 2020 - 10:25

score 487 · Answer 13 · 2020-04-01 10:56:00

487

Views

Parabola with vertex (0,1) is touching the x-axis

Published on 01 Apr 2020 - 10:56

score 431 · Answer 14 · 2026-03-26 06:34:48

431

Views

Conics: why is the eccentricity and focal parameter well-defined, and how to show uniqueness of foci and directrices

Published on 26 Mar 2026 - 6:34

score 77 · Answer 15 · 2026-03-29 23:35:31

77

Views

How to deduce the equation of tangents at $P$ and $Q$ to the curve?

Published on 29 Mar 2026 - 23:35

List Question

Let H be the orthocenter of the sharp triangle ABC

Can we find $\lambda$ with $B(\lambda, |\lambda|) \subseteq K?$

What is the transformation set?

A "jeopardy" with common tangents of two hyperbolas

Point for minimum distance

Show that the line $x+y=q$ intersects the ellipse $x^2-2x+2y^2=3$ at two different points if $q^2<2q+5$

What is a geometric interpretation of $0x+0y=0$

Why do we need the concept of pair of straight lines?

On $xOy$ plane, what is the equation of the vertical line passing through $(x,0)$?

Equations of the points

Show that when $p$ varies, the midpoint of $PR$ lies on the curve $y^2=2x-4$.

Prove that the midpoint of PQ lies on the straight line $y+r^2x=0$.

Parabola with vertex (0,1) is touching the x-axis

Conics: why is the eccentricity and focal parameter well-defined, and how to show uniqueness of foci and directrices

How to deduce the equation of tangents at $P$ and $Q$ to the curve?

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