


Geometry Problem 1387. Quadrilateral, Double Angle, Congruence, Isosceles Triangle. 

Word Cloud of Pythagorean Theorem


Geometry Problem 1386. Thabit ibn Qurra (826 901) Theorem and more conclusions, generalized Pythagorean Theorem to any triangle. 

Conformal Mapping or Transformation of Problem
1386. 

Geometry Problem 1385. Triangle, Orthocenter, Circle, Circumcircle, Angle Bisector, Midpoint, Collinear Points. 

Geometry Problem 1384. Triangle, Orthocenter, Circle, Circumcircle, Angle Bisector, 90 Degree. 

Art of Problem 1384.
Triangle, Orthocenter, Circle, Angle Bisector, Perpendicular, iPad Apps, Mobile. 

Geometry Problem 1383. Triangle, Median, Circle, Chord, Secant, Sum, Product. 

Geometry Problem 1382. Circle, Diameter, Radius, Perpendicular, Congruence. 

Conformal Mapping or Transformation of Problem
1382. 

Geometry Problem 1381. Parallelogram, Exterior Point, Triangle, Area. 

Conformal Mapping or Transformation of
Geometry Problem
1381. 

Poster of Geometry Problem 1381. 

Geometry Problem 1380. Common
Internal Tangents. Circles, Secant, Congruent Chords. 

Poster of Problem 1380. 

Geometric
Art of Problem 985. 

Cahuachi,
Major Nazca Ceremonial Center. 

Geometry Problem 1379. Common External Tangents. Circles, Secant, Congruent Chords. 

Conformal Mapping or Transformation of Problem 291. 

Geometry Problem 1378. Parallelogram, Diagonal perpendicular to a side, Distances from a Point to Vertices, Measurement. 

Art of Problem 291. 

Geometry Problem 1377. Isosceles Triangle, Interior Cevian, Equal Sum of Exradii, Excircle. 

Poster of Geometry Problem 63 

Geometry Problem 1376. Isosceles Triangle, Interior Cevian, Excircles, Tangency Points, Parallel Lines. 

Geometry Problem 1375. Isosceles Triangle, Interior Cevian, Exradius, Excircle, Altitude to the Base. 

Typography
art of Problem 1375. 

Geometry Problem 1374. Isosceles Triangle, Exterior Cevian, Incircle, Excircle, Tangency Points, Parallel Lines. 

Typography
art of Problem 1374. 

Geometry Problem 1373. Isosceles Triangle, Exterior Cevian, Inradius, Exradius, Altitude to the Base. 

Typography
art of Problem 1373. 

Geometry Problem 1372. Equilateral Triangle, Exterior Cevian, Inradius, Exradius, Altitude, Sketch, iPad Apps. 

Cevian Definition.


Einstein and
the Pythagorean theorem proof .
About his "holy geometry book" (Euclid's Elements) Similarity of
triangles.


Geometry Problem 1371: Equilic
Quadrilateral 5 

Etching and Typography of Geometry Problem 1367: Equilic
Quadrilateral using iPad Apps. 

Geometry Problems
1361  1370. 

Geometry Problem 1370: Equilic
Quadrilateral 4 

Geometry Problem 1369: Equilic
Quadrilateral 3 

Geometry Problem 1368: Equilic
Quadrilateral 2 

Geometry Problem 1367: Equilic
Quadrilateral 1 

Geometry Problem 1366.
Square, Angle Bisector, Perpendicular, Concyclic Points, Circle, Sketch, iPad Apps. 

Typography of Problem 491. 

Geometry Problem 1365.
Circle, Tangent, Secant, Chord, Parallel, Midpoint, Sketch, iPad Apps. 

Yanacocha Gold Mine,
Cajamarca, Peru, Open Pit Mining Art


Geometry Problem 1364.
Square, Inscribed Circle, Area, Angle Bisector, Perpendicular, 45 Degrees, Sketch, iPad Apps. 

Antamina Copper Mine, Peru, Open Pit Mining Art


Geometry Problem 1363.
Square, Angle Bisector, Perpendicular, 45 Degrees, Angle, Sketch, iPad Apps. 

Affinity Photo
for iPad Mind Map. 

Geometry Problem 1362.
Equilateral Triangle Inscribed in a Circle, Lunula, Ratio of Areas, Tangent, Sketch, iPad Apps. 

Geometry Problem 1361.
Triangle, Two NinePoint Circles, Feuerbach's Circle, Euler's Circle, Congruent Angles, Sketch, iPad Apps. 

Geometry Problem 1360.
Triangle, NinePoint Circle, Feuerbach's Circle, Euler's Circle, Cyclic Quadrilateral, Concyclic Points, Sketch, iPad Apps. 

Geometry Problem 1359.
Triangle, Circumcircle, Congruent Angles, Midpoints. 

Geometry Problem 1358.
Regular Dodecagon, Diagonals, Concurrency, Points, Lines. 

Geometry Problem 1357.
Regular Dodecagon, Diagonals, Concurrency, Collinearity, Points, Lines. 

Word Cloud of
the Regular Heptagon. 

Basic English ESL: Conversation Questions and Answers by 75 Topics, Mind Map.


Geometric Art of Problem 63.
Regular Heptagon 

Typography of Geometry
Problem 373. 

Typography of Geometry Problem 1304. 

Geometry Problem 1356.
Quadrilateral, Triangle, Angle, 30 Degrees, Congruence. 

Etching of the Taj Mahal.
Using iPad Apps. 

Typography of Geometry Problem 767
Using iPad Apps. 

Typography of Geometry Problem
812. 

Etching and Typography of Geometry Problem 652.
Archimedes Book of Lemmas: Proposition 12
Using iPad Apps. 

Mind Map of Academic
Disciplines
Academic Disciplines in motion. 
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