Question

A convex quadrilateral with propotion

score 106 · Answer 1 · 2018-09-10 23:31:13

106

Views

A convex quadrilateral with propotion

Published on 10 Sep 2018 - 23:31

score 413 · Answer 2 · 2018-09-12 19:26:18

413

Views

Beautiful cyclic quadrilateral property involving isogonal conjugates.

Published on 12 Sep 2018 - 19:26

score 75 · Answer 3 · 2018-09-17 19:33:31

75

Views

If angles $A$, $B$, $C$ of convex quadrilateral $\square ABCD$ are equal, then $D$ lies on the Euler line of $\triangle ABC$

Published on 17 Sep 2018 - 19:33

score 66 · Answer 4 · 2018-09-21 02:17:08

66

Views

Equations of the diagonals of a quadrilateral (convex, concave or crossed) from the equations of its sides, without calculating its vertices

Published on 21 Sep 2018 - 2:17

score 282 · Answer 5 · 2026-03-22 15:45:17

282

Views

Quadrilaterals and parallel lines: An olympiad question

Published on 22 Mar 2026 - 15:45

score 198 · Answer 6 · 2018-10-03 14:58:11

198

Views

Proving two sides of a convex quadrilateral are equal for given condition.

Published on 03 Oct 2018 - 14:58

score 2.5k · Answer 7 · 2018-10-06 22:53:18

2.5k

Views

Solve irregular quadrilateral given 2 angles and 3 sides

Published on 06 Oct 2018 - 22:53

score 304 · Answer 8 · 2018-10-08 17:37:37

304

Views

Slopes of perpendicular diagonals of a quadrilateral and its sides

Published on 08 Oct 2018 - 17:37

score 39 · Answer 9 · 2018-10-09 01:27:09

39

Views

Unable to relate the given sources/set up equation with the given info to solve quadrilateral problem

Published on 09 Oct 2018 - 1:27

score 324 · Answer 10 · 2018-10-10 23:37:46

324

Views

Distance between two circles

Published on 10 Oct 2018 - 23:37

score 53 · Answer 11 · 2018-10-14 13:48:35

53

Views

Maximum value of largest side

Published on 14 Oct 2018 - 13:48

score 494 · Answer 12 · 2018-10-20 00:30:24

494

Views

The cyclic quadrilateral and the slopes of its sides

Published on 20 Oct 2018 - 0:30

score 210 · Answer 13 · 2018-10-21 06:04:19

210

Views

A concave quadrilateral cannot be circumscribed by an ellipse nor by a parabola.

Published on 21 Oct 2018 - 6:04

score 197 · Answer 14 · 2018-10-22 03:50:42

197

Views

The concave quadrilateral and the slopes of its sides

Published on 22 Oct 2018 - 3:50

score 57 · Answer 15 · 2018-10-23 18:11:32

57

Views

Do these areas have any special meaning or name?

Published on 23 Oct 2018 - 18:11

List Question

A convex quadrilateral with propotion

Beautiful cyclic quadrilateral property involving isogonal conjugates.

If angles $A$, $B$, $C$ of convex quadrilateral $\square ABCD$ are equal, then $D$ lies on the Euler line of $\triangle ABC$

Equations of the diagonals of a quadrilateral (convex, concave or crossed) from the equations of its sides, without calculating its vertices

Quadrilaterals and parallel lines: An olympiad question

Proving two sides of a convex quadrilateral are equal for given condition.

Solve irregular quadrilateral given 2 angles and 3 sides

Slopes of perpendicular diagonals of a quadrilateral and its sides

Unable to relate the given sources/set up equation with the given info to solve quadrilateral problem

Distance between two circles

Maximum value of largest side

The cyclic quadrilateral and the slopes of its sides

A concave quadrilateral cannot be circumscribed by an ellipse nor by a parabola.

The concave quadrilateral and the slopes of its sides

Do these areas have any special meaning or name?

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