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Plane Geometry: Open Problems, High School, College


Open Geometry Problems - Index 3

Online education degree: Open geometry problems

College Geometry Online

Geometry Problem 1008

Geometry Problem 1008.
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Three Equal Tangent Circles, Sum of Tangent Lines, Tangency Points.

Geometry Problem 1007

Geometry Problem 1007.
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Hexagon, Midpoint, Triangle, Median, Centroid, Concurrency.

Geometry Problem 991

Geometry Problem 991.
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Triangle, Incircle, Tangency Points, Isosceles, Midpoint, Collinearity, Congruence, Circle.

Geometry Problem 990

Geometry Problem 990.
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Triangle, Incircle, Median, Cevian, Central Angle, Congruence, Circle, Secant, Midpoint, Parallel.

Geometry Problem 988

Geometry Problem 988.
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Right Triangle, Cevians, Angles, 30 Degrees, Triple Angle.

Geometry Problem 987

Geometry Problem 987.
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Triangle, Circumcircle, Incenter, Chord, Parallel, Circle, Tangent. GeoGebra, HTML5 Animation for Tablets (iPad, Nexus).

Geometry Problem 974

Geometry Problem 974.
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'Begonia Theorem', Cevian Triangle, Reflection of a point in a line, Concurrency of Lines. GeoGebra, HTML5 Animation for Tablets.

Geometry Problem 969

Geometry Problem 969.
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Equilateral Triangle, Rectangle, Common Vertex, Right Triangles Areas.

Geometry Problem 966

Geometry Problem 966.
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Triangle, Cevians, Midpoint, Circumcircle, Circle, Tangent Line, Collinear Points.

Geometry Problem 959

Geometry Problem 959.
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Triangle, Sides Ratio 4:1, Inradius, Exradius, Cevian, Mean Proportional, Geometric Mean, Metric Relations.

Geometry Problem 955

Geometry Problem 955.
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Quadrilateral, Triangle, Diagonals, Triangle, Angles, 30, 40, 60, 70 Degrees.

Geometry Problem 952

Geometry Problem 952.
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Triangle, Incenter, Circumcenter, Three Equal Circles, Tangent Line, Tangent Circles, Collinear Points.

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