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Geometry: Open Problems, High School, College, Tutoring

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Geometry: Open Problems
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Geometry
Problem 1494.
Post a solution Parallelogram, Midpoints, Octagon, Areas. |
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Dynamic Geometry 1480.
Post a solution Japanese Theorem for Cyclic Polygon,
Sangaku, Triangulation, Non-intersecting Diagonals, Sum of Inradii, Invariant, Step-by-step Illustration. GeoGebra,
iPad. |
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Dynamic Geometry 1475.
Post a solution Clifford Intersecting Circles Theorem, Step-by-step Illustration, GeoGebra, iPad. |
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Dynamic Geometry 1473.
Post a solution
Kosnita's Theorem, Triangle, Four Circumcenters, Concurrent Line, Step-by-step Illustration. |
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Dynamic Geometry 1471.
Post a solution
Equilateral Triangle, Inside/Outside Point, Incenters, Tangency Points, Concurrent Lines, Step-by-step Illustration. |
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Dynamic Geometry 1470.
Post a solution
Tangential Quadrilateral, Incircles, Tangent,
Parallel, Rhombus, Step-by-step Illustration. |
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Geometry Problem 1462.
Post a solution
Newton-Line, Newton-Gauss Line, Complete Quadrilateral, Midpoints of Sides and Diagonals,
Collinear Points. |
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Dynamic Geometry
1460.
Post a solution
Newton-Gauss Line, Complete Quadrilateral, Midpoints of Diagonals,
Collinear Points, Step-by-step Illustration using GeoGebra. |
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Geometry
Problem 1458.
Post a solution
Triangle, Incircles, Excircle, Area, Step-by-step Illustration using GeoGebra. |
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Dynamic Geometry 1451.
Post a solution
Orthopole of a Line. Step-by-step
illustration using GeoGebra. |
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Dynamic Geometry 1450.
Post a solution
Ortholine, Steiner Line, Complete Quadrilateral, Collineal Orthocenters. Step-by-step
illustration using GeoGebra. |
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Dynamic Geometry 1449.
Post a solution
Salmon Line. Step-by-step
illustration using GeoGebra. |
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Dynamic Geometry Problem 1444.
Post a solution
The Asymmetric Propeller Theorem, Equilateral Triangles, Midpoints. Using GeoGebra. |
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Geometry Problem 1437.
Post a solution
Intersecting Circles, Common Tangent, Equal Product, Art, Poster, Typography, iPad Apps. |
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Geometry Problem 1435.
Post a solution
Circle, Diameter, Inscribed Circles, Circular Sector, Parallelogram, Parallel Lines, Tangency Points,
Poster, Typography, iPad Apps. |
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Geometry Problem 1434.
Post a solution
Equilateral Triangle, Tangent Circles, Tangent Lines, Arithmetic Mean, Measurement,
Poster, Typography, iPad Apps. |
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Geometry Problem 1431.
Post a solution
Triangle, Circumcircle, Parallel Chord, Apollonius, LLC, Congruent Angles, Poster, Conformal Mapping. |
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Geometry Problem 1417.
Post a solution
Triangle, Cevian, Circumcircle, Incenter, Perpendicular, Angle Bisector,
Tangent Lines, Tangent Circles. |
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Geometry Problem 1401.
Post a solution
Right Triangle with three circles on the sides, Isosceles, Diameter, Center, Tangent, Congruence. |
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Geometry Problem 1396.
Post a solution
Triangle with three rectangles on the sides, Vertices, Perpendicular lines, Concurrency. |
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Geometry Problem 1385.
Post a solution
Triangle, Orthocenter, Circle, Circumcircle, Angle Bisector, Midpoint, Collinear Points. |
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Geometry Problem 1376.
Post a solution
Isosceles Triangle, Interior Cevian, Excircles, Tangency Points, Parallel Lines. |
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Last updated: Mar 9, 2022
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