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Recent additions (Page 19), Online
Learning
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Problem
575.
Cyclic quadrilateral, Angle bisector, Measurement. |
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Problem
574.
Circle, Chord, Secant, Angle Bisector, Perpendicular. |
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Rembrandt: 'Portrait of a Man With Arms Akimbo' (1658) and Golden Rectangles.
It will be offered for sale at the TEFAF Maastricht art fair later this year for $47 million.
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Problem
573.
Cyclic quadrilateral, Angle bisector, Perpendicular. |
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Problem
572.
Right triangle, Median, Circle, Diameter, Excircle, Tangent circles. |
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Problem
571.
Circle, Diameter, Chord, Perpendicular, Measurement. |
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Problema
60 (Spanish-language version)
Triangulo isósceles, Ángulos, 30 Grados, Congruencia. |
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Problema
59 (Spanish-language version)
Triangulo rectángulo, Equilatero, Puntos medios. |
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Problema
58 (Spanish-language version)
Triangulo rectángulo, Congruencia, Pitágoras. |
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Problema
57 (Spanish-language version)
Circunferencias, Tangentes, Cuerda, Puntos de tangencia, Cuadrilátero inscriptible. |
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Problem
570.
Square, Center, Right Triangles, Congruence, Collinearity. |
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Problem
569.
Quadrilateral, Excircles, Tangency Points, Congruence. |
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Problem
568.
Triangle, Excircles, Tangency Point, Congruence. |
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Geometry Problems
561 -
570.
Right Triangle, Altitude, Angle Bisector, Congruence, Median, Area, Trisector, 60 Degrees, Equilateral, Parallel, Transversal, Circumcircle, Concyclic, Similarity. |
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Geometry Problems
551 -
560.
Right Triangle, Altitude, Angle Bisector, Congruence, Median, Area, Trisector, 60 Degrees, Equilateral, Parallel, Transversal, Circumcircle, Concyclic, Similarity. |
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Problem
567.
Right triangle, Incircle, Excircle, Collinear tangency points. |
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Sandro Boticelli: The Birth of Venus (c. 1486) and Golden Rectangles. |
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