Question

Geometry Proof Concerning Equality of Lengths on a Quadrilateral

score 151 · Answer 1 · 2017-03-12 19:20:31

151

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Geometry Proof Concerning Equality of Lengths on a Quadrilateral

Published on 12 Mar 2017 - 19:20

score 158 · Answer 2 · 2017-03-26 01:59:49

158

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Iterating a geometric construction on quadrilaterals

Published on 26 Mar 2017 - 1:59

score 1.1k · Answer 3 · 2017-03-28 18:14:31

1.1k

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Finding the fourth point of a perfect square (without knowing order of points)

Published on 28 Mar 2017 - 18:14

score 183 · Answer 4 · 2017-03-28 22:06:47

183

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Parallelogram and Congruence

Published on 28 Mar 2017 - 22:06

score 693 · Answer 5 · 2026-03-27 12:34:14

693

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How to inscribe an ellipse into an isosceles trapezoid?

Published on 27 Mar 2026 - 12:34

score 501 · Answer 6 · 2017-04-05 18:50:51

501

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Construct triangle ABC, denote I as the incenter, A' as the mid point of the arc BC of the circumcircle. Show that A'B = A'C = A'I

Published on 05 Apr 2017 - 18:50

score 200 · Answer 7 · 2023-02-12 02:35:08

200

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Find the angle between the diagonals in a quadrilateral

Published on 12 Feb 2023 - 2:35

score 73 · Answer 8 · 2026-03-25 06:05:42

73

Views

Barycentric coordinates of the origin point of a quadrilateral

Published on 25 Mar 2026 - 6:05

score 169 · Answer 9 · 2023-03-08 06:42:01

Calculating the area of a quadrilateral which circumscribes a circle and the distance of a point lying inside it to all the vertices is given.

score 96 · Answer 10 · 2023-03-08 22:00:41

96

Views

A convex quadrilateral causes minimal total distance to vertices at the intersection of diagonals

Published on 08 Mar 2023 - 22:00

score 229 · Answer 11 · 2023-03-18 15:21:59

229

Views

A geometry problem from an Italian contest

Published on 18 Mar 2023 - 15:21

score 37 · Answer 12 · 2023-04-13 23:55:06

37

Views

Solution explanation for finding the value of Angle $\theta$.

Published on 13 Apr 2023 - 23:55

score 105 · Answer 13 · 2023-04-28 14:47:46

Let $C_1(O_1, r)$ and $C_2(O_2, r)$ be two congruent secant circles. Calculate in function of the $r$, the area of the quadrilateral $AO_1BO_2$.

score 67 · Answer 14 · 2023-05-11 23:01:46

67

Views

How prove that $AD$ and $BC$ of the given convex quadrilateral are parallel?

Published on 11 May 2023 - 23:01

score 329 · Answer 15 · 2023-05-17 15:01:05

329

Views

Let ABCD be a convex quadrilateral with AD = BC. Show that AD and BC determine congruent angles with the line passing the midpoints.

Published on 17 May 2023 - 15:01

List Question

Geometry Proof Concerning Equality of Lengths on a Quadrilateral

Iterating a geometric construction on quadrilaterals

Finding the fourth point of a perfect square (without knowing order of points)

Parallelogram and Congruence

How to inscribe an ellipse into an isosceles trapezoid?

Construct triangle ABC, denote I as the incenter, A' as the mid point of the arc BC of the circumcircle. Show that A'B = A'C = A'I

Find the angle between the diagonals in a quadrilateral

Barycentric coordinates of the origin point of a quadrilateral

Calculating the area of a quadrilateral which circumscribes a circle and the distance of a point lying inside it to all the vertices is given.

A convex quadrilateral causes minimal total distance to vertices at the intersection of diagonals

A geometry problem from an Italian contest

Solution explanation for finding the value of Angle $\theta$.

Let $C_1(O_1, r)$ and $C_2(O_2, r)$ be two congruent secant circles. Calculate in function of the $r$, the area of the quadrilateral $AO_1BO_2$.

How prove that $AD$ and $BC$ of the given convex quadrilateral are parallel?

Let ABCD be a convex quadrilateral with AD = BC. Show that AD and BC determine congruent angles with the line passing the midpoints.

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