List questions from quadrilateral

Published on 18 Mar 2020 - 16:26

256

Views

Proving 4 points on a circle.

Published on 24 Mar 2020 - 9:27

346

Views

Property of a semicyclic quadrilateral

Published on 27 Mar 2020 - 14:26

114

Views

A problem on Euclidean Geometry of of similarity of triangles, squares and angles

Published on 30 Mar 2020 - 3:46

49

Views

What are the odds of all $4$ of them making a quadrilateral that has no sides of icosagon $(\text{I})$?

Published on 01 Apr 2020 - 6:54

34

Views

Largest incircle given any point inside convex quadrilateral

Published on 01 Apr 2020 - 11:02

63

Views

Geometry problem - proving atleast three lines are concurrent!

Published on 04 Apr 2020 - 6:58

609

Views

Proving a quadrilateral may have at most four axes of symmetry

Published on 05 Apr 2020 - 1:53

685

Views

Quadrilateral/Geometry: Find the area of all the triangles in a trapezoid

Published on 05 Apr 2020 - 22:39

50

Views

Problem using similarity of triangles (I guess).

Published on 07 Apr 2020 - 17:02

136

Views

Prove if angle bisectors of a pair of opposite angles of quad. meet on diagonal made by remaining points then the remaining points will do same

Published on 09 Apr 2020 - 8:36

112

Views

Finding the side of a triangle made from extending a diagonal

Published on 14 Apr 2020 - 9:13

293

Views

USAMO 2011 problem #5

Published on 23 Mar 2026 - 11:59

151

Views

How do you prove $S_{XYZT} \leq \dfrac{1}{5} S_{ABCD} $?

Published on 23 Apr 2020 - 20:48

78

Views

Centroid coordinates of an irregular quadrilateral within a rectangular plane

Published on 23 Feb 2026 - 8:31

List Question

1985 IMO Problem 1 solution by extending

Proving 4 points on a circle.

Property of a semicyclic quadrilateral

A problem on Euclidean Geometry of of similarity of triangles, squares and angles

What are the odds of all $4$ of them making a quadrilateral that has no sides of icosagon $(\text{I})$?

Largest incircle given any point inside convex quadrilateral

Geometry problem - proving atleast three lines are concurrent!

Proving a quadrilateral may have at most four axes of symmetry

Quadrilateral/Geometry: Find the area of all the triangles in a trapezoid

Problem using similarity of triangles (I guess).

Prove if angle bisectors of a pair of opposite angles of quad. meet on diagonal made by remaining points then the remaining points will do same

Finding the side of a triangle made from extending a diagonal

USAMO 2011 problem #5

How do you prove $S_{XYZT} \leq \dfrac{1}{5} S_{ABCD} $?

Centroid coordinates of an irregular quadrilateral within a rectangular plane

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