


Geometry Problem 1409. Right Triangle, Incircle, Excircle, Collinear Tangency Points, Collinearity. 

Geometry Problem 1408. Right Triangle, Incircle, Excircle, Incenter, Midpoint, Tangency Point, Collinearity. 

Typography of Geometry Problem 1408. Right Triangle, Incircle, Excircle, Incenter, Midpoint, Tangency Point, Collinearity, iPad Apps. 

Geometry Problem 1407. Right Triangle, Incircle, Excircle, Collinear Tangency Points, Collinearity. 

Geometry Problem 1406. Four Congruent Circles, Measurement, Metric Relations,
Sum of the Squares. 

Semiotics Mind Map. Google Books Ngram Viewer of Semiotics, Semiology, and Semiosis. 

Geometry Problem 1405. Four Congruent Circles, Congruent Chords. 

Geometry Problem 1404. Three Circles, Center, Intersecting Points, Collinearity, Congruence. 

Art of Geometry Problem 1404. Three Intersecting Circles and Circle Patterns using Mobile Apps. 

Geometry Problem 1403. Quadrilateral, 90 Degree Angle, Perpendicular, Congruence. 

Art of Geometry Problem 1404. Three Intersecting Circles using Mobile Apps. 

Geometry Problem 1402. Triangle, Three Tangent Circles, Parallel Diameter, Collinear Points. 

Geometric Art: Tokay Gecko Eye, Stereographic Projection. 

Geometry Problem 1401. Right Triangle with three circles on the sides, Isosceles, Diameter, Center, Tangent, Congruence. 

Geometric Art: Kaleidoscope of Gecko Patterns
5 using iPad Apps. 

Geometry Problem 1400. Triangle with three rectangles on the sides, Perpendicular Bisectors, Concurrency. 

Geometry Problem 1399.
Triangle, Circumcircle, Perpendiculars, Angles, Congruence, Cyclic Quadrilateral. 

Geometry Problem 1398.
Isosceles Triangle, Circle, Radius, Perpendicular, Measurement. 

Geometry Art: Gecko Art Index. 

Geometry Problem 1397. Circle, Diameter, Tangent, Secant, 90 Degrees Angle,
Perpendicular, Collinear Points. 

Geometry Problem 1396. Triangle with three rectangles on the sides, Vertices, Perpendicular lines, Concurrency. 

Geometry Problem 1395. Triangle with three rectangles on the sides, Midpoints, Perpendicular lines, Concurrency. 

Geometric Art: Celtic Maze, Kaleidoscope 

Geometry Problem 1394. Three Circles and Three Pair of Common Internal Tangents, Concurrency. 

Geometric Art: Celtic Maze,
Kaleidoscope, Deform around Spiral 

Geometry Problem 1393. Monge's Circle Theorem, Three Circles and Three Pair of Common Tangents, Collinearity. 

Geometry Problem 1392. Two Cyclic Quadrilateral, Cyclic Octagon, Circle. 

Geometry Art: Celtic Art Index. 

Geometry Problem 1391. Two Triangles, Ratio of Areas, Circumcircle. 

Geometry Problem 1390. Triangle, any point, perpendicular, sum of the squares. 

Art of Geometry Problem
603. Generative Art Composition. 

Geometry Problem 1389. Triangle, 4012020 degree, Angle, Congruence. 

Poster of Geometry Problem 1389. 

Isolines Art Illustration of the Nazca Lines: The Parrot.


Geometry Problem 1388. Triangle 406080 degree, Incenter, Congruence. 

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. 

Poster
of problem 80. Area of a
triangle, side, incircle, inradius. 

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. 

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

Conformal Mapping or Transformation of Problem 291. 

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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