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Geometry Problem 1346. Equilateral Triangle, Point on the Incircle, Altitude, Perpendicular, Sum of Squares, Distance.


Geometry Problem 1345: Three Equilateral Triangles, Center, Area, Common Vertex.


Geometry Problem 1344, Bottema's Theorem: Triangle and Squares with Interactive Geometry Software.


Problem 1343. Triangle, Excircles, Circle, Tangent, Tangency Points, Chord, Perpendicular, 90 Degrees, Collinearity. Machu Picchu in the background.


Geometric Art of Problem 1085.


Geometric Art of Lunes of Hippocrates 1, Lunes of Alhazen.


Problem 1342. Circle, Secant, Chord, Midpoint, Concyclic Points, Cyclic Quadrilateral.


Problem 1341. Isosceles Triangle, 802080 Degrees, Circumcenter, Angle Bisector.


Problem 1340. Triangle, Incenter, Concentric Circles, Isosceles Triangles, Congruence.


Problem 1334. Typography and Sketch.


Software Development Mind Map.


Typography and Sketch of Problem 186.


Typography and Sketch of Problem 185.


Hyperbolic Kaleidoscope of Problem 151.


Problem 1339. Circle, Diameter, Tangent, Secant, Parallelogram.


Geometric Art: iPad Apps Squares, Fluid Animation, NavierStokes equations, Kaleidoscope, Deform around Spiral.


Problem 1338. Four Squares, Diagonals, Angle, 45 Degrees, Areas.


Hyperbolic Kaleidoscope of Problem 1341.


Hyperbolic Kaleidoscope of Problem 1338.

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