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Online Geometry Problems, Level: Mathematics Education, High School, College
NCTM Processes:
Problem Solving, Reasoning & Proof, Communications, Connections, and
Representation
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Geometry Problems - Index (Page 1 of
40)
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Open Geometry Problems |
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Geometry Problem
752.
Square, Circle, Tangent, Chord, Angle. |
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Geometry Problem
751.
Parallelogram, Congruence, Intersecting Lines, Angle Bisector. |
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Geometry Problem
750.
Complete Quadrilateral, Triangle, Diagonal, Parallel, Similarity, Metric Relations. |
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Geometry Problem
749.
Triangle, Rhombus, Parallel, Harmonic Means, Metric Relations. |
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Geometry Problem
748.
Quadrilateral, 90 Degrees, Diagonal, Perpendicular, Metric Relations. |
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Geometry Problem
747.
Trapezoid, Diagonals, Parallel, Bases, Midpoint, Similarity, Harmonic Mean, Metric Relations. |
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Geometry Problem
746.
Triangle, Cevian, Parallel, Similarity, Harmonic Mean, Metric Relations. |
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Geometry Problem
745.
Circle, 90 Degrees, Chord, Congruence, Perpendicular, Metric Relations. |
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Geometry Problem
744.
Parallelogram, Circle, Diameter, Chord, Congruence, Triangle, Metric Relations. |
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Geometry Problem
743.
Trapezoid, Triangle, Perpendicular, Parallel, Angle |
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Geometry Problem
742.
Scalene Triangle, Orthocenter, Centroid, Circumcenter, Circumradius, Midpoint, Distance, Square, Metric Relations. |
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Geometry Problem
741.
Scalene Triangle, Incenter, Circumcircle, Midpoint, Arc, Congruence. |
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Geometry Problem
740.
Scalene Triangle, Angle, Semi-sum, Cevian, Isosceles Triangle. |
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Triangle with Double Angle, Theorems and Problems, Index
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Geometry Problem
738.
Intersecting Circles, External Common Tangent, Common Chord, Secant, Circumcircle, Cyclic Quadrilateral, Concyclic Points. |
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Intersection of a Line with a Circle
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Geometry Problem
737.
Cyclic Quadrilateral, Circumscribed Circle, Diameter, Tangent, Perpendicular. |
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Open Geometry Problems
Index |
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Geometry Problem
736.
Triangle, Altitude, Perpendicular, Angles, Cyclic Quadrilateral. |
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Geometry Problem
735.
Triangle, Altitude, Perpendicular, Semiperimeter of the Orthic Triangle, Congruence. |
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Geometry Problem
734.
Triangle, Isosceles, Median, Parallel, Angle Bisector, Congruence, Midpoint. |
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Geometry Problem
733.
Triangle, Orthocenter, Altitude, Reflection in a line, Circumcircle, Concurrency. |
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Geometry Problem
732.
Triangle, Altitude, Orthic Triangle, Orthocenter, Congruence, Parallelogram. |
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Geometry Problem
731.
Cyclic quadrilateral, Triangle, Orthocenter, Altitude, Perpendicular, Parallelogram. |
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Geometry Problem
730.
Triangle, Altitude, Orthocenter, Perpendicular, Concurrent Lines. |
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Geometry Problem
729.
Triangle, Altitude, Orthocenter, Circumcircle, Perpendicular, Midpoint. |
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Geometry Problem
728.
Triangle, Altitude, Perpendicular, Circumcircle, Midpoint, Intersecting Circles, Concurrency. |
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Geometry Problem
727.
Triangle, Isosceles, Congruence, Angles, Measurement. |
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Geometry Problem
726.
Isosceles Triangle, Perpendicular, Midpoint, 90 Degrees. |
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Geometry Problem
725.
Kurschak's Dodecagon, Square, Equilateral Triangle, Midpoints, 30, 60 Degrees. |
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Geometry Problem
724.
Circumscribed Quadrilateral, Circle, Angle, Incenter, Half
the Measure. |
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Geometry Problem
723.
Squares, Circumscribed Circles, Collinear points. |
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Geometry Problem
722.
Squares, Circumscribed Circles, Collinear points. |
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Geometry Problem
721.
Triangle, Orthocenter, Circumcircle, Altitude, Collinear points. |
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Geometry Problem
720.
Excenter, Intersecting Circles, Angle, Measurement. |
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Geometry Problem
719.
Incenter, Intersecting Circles, Angle, Measurement. |
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Geometry Problem
718.
Intersecting Circles, Midpoint, Angle, Measurement. |
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Geometry Problem
717.
Intersecting Circles, Midpoint, Angle, Measurement. |
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Geometry Problem
716.
Problem 716. Intersecting Circles, Center, Radius, Perpendicular, 90 Degrees. |
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Geometry Problem
715.
Triangle, Altitudes, Parallel, Circumcircle, Angle, Measurement. |
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Geometry Problem
714.
Triangle, Parallel, Cevians, Midpoints, Median, Ceva Theorem. |
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Geometry Problem
713.
Tangent Circles, Diameter, Chord, Tangent, Incenter, Incircle, Triangle. |
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Geometry Problem
712.
Semicircle, Diameter, Tangent, Perpendicular, Angle Measure. |
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Geometry Problem
711.
Rectangle, Midpoint, Angle, Concyclic Points, Cyclic Quadrilateral. |
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Geometry Problem
710.
Parallelogram, Midpoint, Diagonal, Collinear Points, Metric Relations, Triangle, Similarity, Congruence. |
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Geometry Problem
709.
Parallelogram, Midpoint, Diagonal, Metric Relations, Triangle. |
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Problem Solving Techniques, Interactive Mind Map.
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Geometry Problem
708.
Circle, Tangent, Intersecting, Lune, Area, Diameter. |
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Geometry Problem
707.
Triangle, Excenters, Angle Bisectors, Angle, Measurement. |
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Geometry Problem
706.
Triangle, Cevian, Three Circumcenters, Circumcircles, Concyclic Points, Cyclic quadrilateral. |
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Geometry Problem
705.
Intersecting Circles, Diameter, Angles, Measurement. |
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Geometry Problem
704.
Triangle, Orthocenter, Altitude, Midpoint, Perpendicular. |
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Geometry Problem
703.
Triangle, Incircle, Tangency point, Diameter, Congruence. |
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Geometry Problem
702.
Triangle, Circumcircle, Parallel, Concyclic Points. |
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Geometry Problem
701.
Intersecting Circles, Diameter, Perpendicular, Angles, Congruence. |
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Geometry Problem
700.
Equilateral Triangle, Circle, Circular Segment, Midpoint of a side, Metric Relations. |
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Geometry Problem 699.
Equilateral Triangle, Circle, Circular Segment, Midpoint, Metric Relations. |
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Geometry Problems 691 -
700.
Triangle, Quadrilateral, Circle, Metric Relations, Square, 30-60-120 Degrees, Area, Congruence. |
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Geometry Problem 698.
Quadrilateral, Diagonal, Angle Bisector, Triangle, 120 Degrees. |
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Geometry Problem 697.
Square, Circle, Sector, Segment, Tangent, Inscribed, Congruence, Mind Map, Polya. |
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Ten
Geometry Problems, Visual Index |
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Geometry Problem 696.
Triangle, Angles, Auxiliary Construction, Congruence, Mind Map, Polya. |
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Geometry Problem 695.
Triangle, Quadrilateral, Angles, Auxiliary Construction, Congruence, Mind Map, Polya. |
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Geometry Problem 694.
Triangle, Angles, 30 Degrees, Auxiliary Construction, Mind Map, Polya. |
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Geometry Problem 693.
Square, Inscribed and Circumscribed Circle, Areas, Mind Map, Polya. |
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Geometry Problem 692.
Quatrefoil, Four Equal Circles and a Circle Inscribed in a Square, Areas, Mind Map, Polya. |
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Geometry Problem 691.
Isosceles Triangle, 80-80-20 Degrees, Angles, Congruence, Mind Map, Polya. |
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Problem 690: Distance between the Incenter and the Centroid of a
Triangle.
Formula in terms of the sides a,b,c. |
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Geometry Problem 689.
Triangle, Three Excircles, Tangency points, Tangent lines, Concurrent Lines, Mind Map. |
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Geometry Problem 688.
Triangle, Angles, 10, 20, 30, 40, 60 Degrees, Measure, Mind Map, Polya. |
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Geometry Problem 687.
Triangle, Three Excircles, Tangency points, Concurrent Lines. |
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Geometry Problem 686.
Triangle, Three Excircles, Tangency points, Tangent lines, Semi-perimeter, Congruence. |
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Geometry Problem 685
Isosceles Triangle, 100-40-40 Degrees, Angles, Congruence. |
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Geometry Problem 684:
Outer Nagel Point.
Triangle, Excircles, Incircle Tangency points, Concurrent lines, Semi-perimeter, Ceva theorem. |
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Geometry Problem 683:
Nagel Point.
Triangle, Excircles, Tangency points, Concurrent lines, Semi-perimeter, Ceva theorem. |
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Geometry Problem 682: Gergonne External Point.
Triangle, Excircle, Tangency points, Concurrent lines, Semiperimeter, Ceva theorem. |
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Geometry Problem 681:
Gergonne Point.
Triangle, Incircle, Tangency points, Concurrent lines, Semiperimeter, Ceva theorem. |
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