Question

Proof With Cyclic Quadrilateral and Circle

score 4.3k · Answer 1 · 2026-03-28 08:49:16

4.3k

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Proof With Cyclic Quadrilateral and Circle

Published on 28 Mar 2026 - 8:49

score 258 · Answer 2 · 2016-09-15 17:07:40

258

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Orthodiagonal quadrilateral

Published on 15 Sep 2016 - 17:07

score 974 · Answer 3 · 2026-03-25 18:47:04

974

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Using Slopes and Distances to Determine Quadrilaterals

Published on 25 Mar 2026 - 18:47

score 729 · Answer 4 · 2016-09-24 06:13:08

729

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Minimizing Perimeter of a quadrilateral

Published on 24 Sep 2016 - 6:13

score 3.7k · Answer 5 · 2016-09-25 02:44:49

3.7k

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In convex quadrilateral $ABCD,$ $\angle A \cong \angle C,$ $AB=CD=180,$ and $AD \ne BC.$ The perimeter of $ABCD$ is $640.$ Find $\cos A.$

Published on 25 Sep 2016 - 2:44

score 1k · Answer 6 · 2016-09-25 13:35:23

1k

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Circumcentre of triangles in a quadrilateral

Published on 25 Sep 2016 - 13:35

score 1.8k · Answer 7 · 2026-03-26 16:03:59

1.8k

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Largest incircle inside a quadrilateral radius calculation

Published on 26 Mar 2026 - 16:03

score 133 · Answer 8 · 2016-10-02 16:49:09

133

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Cyclic Quadrilaterals Advanced

Published on 02 Oct 2016 - 16:49

score 8k · Answer 9 · 2016-10-04 18:49:19

8k

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Prove that the perimeter of any quadrilateral is greater than twice the length of any of its diagonal

Published on 04 Oct 2016 - 18:49

score 2.5k · Answer 10 · 2016-10-07 11:44:50

2.5k

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Check for collinearity between four points that supposedly build a quadrilateral

Published on 07 Oct 2016 - 11:44

score 56 · Answer 11 · 2016-10-07 12:15:32

56

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Show that ABQC is a cyclic quadrilateral & $\triangle BPD $ is isosceles

Published on 07 Oct 2016 - 12:15

score 2.6k · Answer 12 · 2016-10-08 03:14:21

2.6k

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prove that the quadrilaterals are congruent

Published on 08 Oct 2016 - 3:14

score 261 · Answer 13 · 2016-10-17 09:08:16

261

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Centre of ellipse with inscribed trapezoid?

Published on 17 Oct 2016 - 9:08

score 3.4k · Answer 14 · 2016-10-29 03:26:34

3.4k

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Radius of a cyclic quadrilateral given diagonals

Published on 29 Oct 2016 - 3:26

score 1.2k · Answer 15 · 2016-11-03 11:44:14

1.2k

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point equidistant from all sides of quadrilateral

Published on 03 Nov 2016 - 11:44

List Question

Proof With Cyclic Quadrilateral and Circle

Orthodiagonal quadrilateral

Using Slopes and Distances to Determine Quadrilaterals

Minimizing Perimeter of a quadrilateral

In convex quadrilateral $ABCD,$ $\angle A \cong \angle C,$ $AB=CD=180,$ and $AD \ne BC.$ The perimeter of $ABCD$ is $640.$ Find $\cos A.$

Circumcentre of triangles in a quadrilateral

Largest incircle inside a quadrilateral radius calculation

Cyclic Quadrilaterals Advanced

Prove that the perimeter of any quadrilateral is greater than twice the length of any of its diagonal

Check for collinearity between four points that supposedly build a quadrilateral

Show that ABQC is a cyclic quadrilateral & $\triangle BPD $ is isosceles

prove that the quadrilaterals are congruent

Centre of ellipse with inscribed trapezoid?

Radius of a cyclic quadrilateral given diagonals

point equidistant from all sides of quadrilateral

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