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Geometry Problem
901
Intersecting Circles, Common External Tangent, Secant, Circumcircle, Concyclic Points, Cyclic Quadrilateral.
GeoGebra, HTML5 Animation for Tablets
Static Diagram of problem 902
Triangle, Four Squares, Center, Concurrent Lines.
GeoGebra, HTML5 Animation for Tablets
Problem 903: First Fermat Point
Problem 904: Second Fermat Point: Static diagram.
Triangle, Equilateral triangles, Concurrent lines
Problem 905: Lester Circle Theorem
Geometry Problem 906.
Bicentric Quadrilateral, Incircle, Circumcircle, Circunscribed, Inscribed, Perpendicular.
Geometry Problem 907.
Bicentric Quadrilateral, Incircle, Circumcircle, Circunscribed, Inscribed, Tangent, Inradius.
Geometry Problem 908.
Bicentric Quadrilateral, Incircle, Circumcircle, Circunscribed, Inscribed, Tangent, Inradius.
Geometry Problem 909.
Bicentric Quadrilateral, Incircle, Circumcircle, Circumscribed, Inscribed, Tangent, Inradius,
Distance.
Geometry Problem 910.
Bicentric Quadrilateral, Distance between the Incenter and Circumcenter, Incircle, Circumcircle, Circumscribed, Inscribed, Circumradius.
Geometry Problem 911.
Right Triangle, Double Angle, Triple Angle, Concyclic Points, Cyclic Quadrilateral.
Geometry Problem 912.
Right Triangle, Double Angle, Triple Angle, Perpendicular Lines.
Geometry Problem 913.
Right Triangle, Double Angle, Triple Angle, Metric Relations.
Geometry Problem 914.
Triangle, Orthocenter, Angle Bisector, Parallel Lines, Midpoint.
Geometry Problem 915.
Triangle, Intersecting Circles, Concyclic Points, Cyclic Quadrilateral.
Geometry Problem 916.
Cyclic Quadrilateral, Three Circles, Diameter, Congruence.
Geometry Problem 917.
Triangle, Congruence, Midpoints, Angle Bisector, Perpendicular.
Geometry Problem 918.
Triangle, Incenter, Incircle, Angle Bisector, Perpendicular, Metric Relations.
Geometry Problem 919.
Rhombus, Triangle, Perpendicular, 90 Degrees, Congruence.
Geometry Problem 920.
Triangle, Angles, 10, 20 Degrees, Congruence.
Geometry Problem 921.
Right Triangle, Circumcircle, Arc, Midpoint, Tangency Point, Incircle.
Geometry Problem 922.
Circle, Tangent Lines, Tangency Points, Chord, Secant, Harmonic Mean.
Geometry Problem 923.
Quadrilateral, Quadrangle, Obtuse Angle, Triangle, Diagonal, Inequality, Length.
Geometry Problem 924.
Quadrilateral, Diagonal, Perpendicular, Circle, Tangent, Midpoint, Metric Relations.
Geometry Problem 925.
Cyclic Quadrilateral, Diagonal, Circle, Angle Bisector, Parallel.
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Geometry Problem 926.
Two Equilateral Triangles, Midpoint, Perpendicular, Metric Relations.
Geometry Problem 927.
Semicircle, Diameter, Radius, Equal Arcs, Chord, Triangle, Congruence.
Geometry Problem 928.
Triangle, Midpoint, Median, Cevian, Concurrency, Area.
Geometry Problem 929.
Triangle, Orthocenter, Circumcircle, Reflection, Concurrency.
Geometry Problem 930.
Acute Triangle, Altitudes, Circles, Diameter, Angle, Measure.
Geometry Problem 931.
Square, Circle, Semicircle, Diameter, Triangle, Angle, Metric Relations.
Geometry Problem 932.
Square, Midpoint, Diagonal, Ratio 3:1, Angle Measure, Congruence.
Geometry Problem 933.
Square, Center, Transversal, Perpendicular, Metric Relations, Congruence.
Geometry Problem 934.
Square, Circle, Center, Perpendicular, Metric Relations.
Geometry Problem 935.
Square, Circle, Center, Perpendicular, Metric Relations.
Geometry Problem 936.
Circle, Semicircle, Diameter, Tangent, Radius, Chord, Metric Relations.
Geometry Problem 937.
Triangle, Circumcircle, Circles, Tangent, Sides, Midpoint.
Geometry Problem 938.
Cyclic Quadrilateral, Triangle, Circumcircle, Circles, Circumcenter, Circumradius, Distance, Metric Relations.
Geometry Problem 939.
Circle, Tangent, Secant, Chord, Parallel, Midpoint.
Geometry Problem 940.
Circle, Tangent, Secant, Chord, Parallel, Perpendicular, 90 Degrees, Midpoint.
Geometry Problem 941.
Circles Tangent Externally, Tangent, Secant, Proportion, Angle.
Geometry Problem 942.
Triangle, Circles, Circumcircle, Sagitta, Incircle, Excircle, Inradius, Exradius, Metric Relations.
Geometry Problem 943.
Triangle, Incircle, Inscribed Circle, Tangency Points, Parallel, Metric Relations.
Geometry Problem 944.
Triangle, Orthocenter, Altitude, Perpendicular, 90 Degrees, Parallel Lines.
Geometry Problem 945.
Triangle, Concurrent Lines, Cevians, Perpendicular, Angle Bisector.
Geometry Problem 946.
Triangle, Quadrilateral, Area, Diagonal, Midpoint, Parallel.
Geometry Problem 947.
Triangle, Circumcircle, Angle Bisector, Chord, Arc, Parallel.
Geometry Problem 948.
Intersecting Circles, Secant, Cyclic Quadrilateral, Concyclic.
Geometry Problem 949.
Intersecting Circles, Secant, Cyclic Quadrilateral, Concyclic Points.
Geometry Problem 950.
Intersecting Circles, Secant, Cyclic Quadrilateral, Concyclic Points.
Geometry Problem 951.
Intersecting Circles, Chord, Diameter, Parallel, Cyclic Quadrilateral, Concyclic Points.
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Geometry Problem 952.
Triangle, Incenter, Circumcenter, Three Equal Circles, Tangent Line, Tangent Circles, Collinear Points.
Geometry Problem 953.
Intersecting Circles, Secant, Common Chord, Cyclic Quadrilateral, Perpendicular.
Geometry Problem 955.
Quadrilateral Triangle, Diagonals, Triangle, Angles, 30, 40, 60, 70 Degrees.
Geometry Problem 956.
Two Equilateral Triangles, Center, Collinear Points, Midpoint, Right Triangle, 30, 60, 90 Degrees.
Geometry Problem 957.
Equilateral Triangle, Inscribed Circle, Incircle, Circumscribed Circle, Circumcircle, Area, Circular Segment.
Geometry Problem 958.
Isosceles Triangle, Altitude, 45 Degrees, Perpendicular, Angle Bisector, Metric Relations.
Geometry Problem 959.
Triangle, Sides Ratio 4:1, Inradius, Exradius, Cevian, Mean Proportional, Geometric Mean, Metric Relations.
Geometry Problem 960.
Quadrilateral, Trisection, Sides, Congruence, Similarity, Triangle.
Geometry Problem 961.
Quadrilateral, Trisection, Sides, Sum of Areas.
Geometry Problem 962.
Triangle, Two Cevians, Areas, Equal Products.
Geometry Problem 963.
Right Triangle, 30-60-90 Degrees, Angle Bisectors, Metric Relations.
Geometry Problem 964.
Right Triangle, Cevians, Angles, 10, 20, 30 Degrees.
Geometry Problem 965.
Triangle, Cevians, Midpoint, Circumcircle, Circle, Tangent Line, Metric Relations.
Geometry Problem 966.
Triangle, Cevians, Midpoint, Circumcircle, Circle, Tangent Line, Collinear Points.
Geometry Problem 967.
Three Equilateral Triangles, Midpoints. GeoGebra, HTML5 Animation for Tablets (iPad, Nexus).
Geometry Problem 968.
Equilateral Triangle, Rectangle, Common Vertex, Midpoint.
Geometry Problem 969.
Equilateral Triangle, Rectangle, Common Vertex, Right Triangles Areas.
Geometry Problem 970.
Equilateral Triangle, Circumcircle, Secant, Metric Relations.
Geometry Problem 971.
Equilateral Triangle, Rectangle, Common Vertex, Sum of Right Triangles Areas.
Geometry Problem 972.
Equilateral Triangle, Vertices, Three Parallel, Equal Circles, Perpendicular Bisector.
Geometry Problem 973.
Three Parallel, Square, Vertices, Distance Between Two Parallel Lines, Side, Metric Relations.
Geometry Problem 974.
'Begonia Theorem', Cevian Triangle, Reflection of a point in a line, Concurrency of Lines. GeoGebra, HTML5 Animation for Tablets.
Geometry Problem 975.
Isosceles Right Triangle, 45 Degrees, Angle Bisector, Hypotenuse.
Geometry Problem 976.
Isosceles Right Triangle, 45 Degrees, Incenter, Angle Bisector, Hypotenuse.
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Geometry Problem 977.
Acute Triangle, Circumcenter, Orthocenter, Distance, Circumradius, Altitude, Metric Relations.
Geometry Problem 978.
Parallelogram, Diagonal, Transversal, Similarity, Metric Relations.
Geometry Problem 979.
Triangle, Cevian, Angle Bisector, Concurrency, 90 Degrees, Perpendicular.
Geometry Problem 980.
Equilateral Triangle, Vertices, Three Parallel, Equal Circles, Construction.
Geometry Problem 981.
Triangle, Concurrent Cevians, Midpoints, Area, Hexagon.
Geometry Problem 982.
Triangle, Excenters, Excentral Triangle, Circumcenter, Area, Hexagon.
Geometry Problem 983.
Regular Hexagon, A point and six triangles, Areas.
Geometry Problem 984.
Triangle, Circumcircle, Altitudes, Midpoint, Collinear Points.
Geometry Problem 985.
Circle, Radius, Perpendicular, Concentric Circles, Congruence, Triangle.
Geometry Problem 986.
Triangle, Median, Midpoint, Equal Angles, 45 Degrees.
Geometry Problem 987.
Triangle, Circumcircle, Incenter, Chord, Parallel, Circle, Tangent. GeoGebra, HTML5 Animation for Tablets (iPad, Nexus).
Geometry Problem 988.
Right Triangle, Cevians, Angles, 30 Degrees, Triple Angle.
Geometry Problem 989.
Arbelos, Semicircles, Diameter, Perpendicular, 90 Degree, Common External Tangent, Rectangle, Midpoint of Arc.
Geometry Problem 990.
Triangle, Incircle, Median, Cevian, Central Angle, Congruence, Circle, Secant, Midpoint.
Geometry Problem 991.
Triangle, Incircle, Tangency Points, Isosceles, Midpoint, Collinearity, Congruence, Circle.
Geometry Problem 992.
Triangle, Interior Point, Angles, 20, 30 , 40, 50 Degree.
Geometry Problem 993.
Intersecting Circles, Secant, Tangent, Concyclic Points, Cyclic Quadrilateral, Perpendicular.
Geometry Problem 994.
Trapezoid, Midpoints of the bases, Concurrent Lines.
Geometry Problem 995.
Quadrilateral, Perpendicular Diagonals, Perpendicular Bisector, Parallel.
Geometry Problem 996.
Circle, Tangent, Congruence, Chord, Midpoint, Bisection.
Geometry Problem 997.
Equilateral Triangle, Vertices, Three Parallel Lines, Distance, Metric Relations.
Geometry Problem 998.
Scalene Triangle, Isosceles, Angle, 120 Degree, Midpoint, Equilateral, Congruence.
Geometry Problem 999.
Right Triangle, Midpoint, Median, Double Angle, Congruence.
Geometry Problem
1000.
Scalene Triangle, Isosceles, Angle, 120 Degree, Midpoint, Distance, Equilateral, Congruence, Perpendicular, Metric Relations. |
