Geometry: Tangent Circles, Theorems and Problems, Page 1

Tangent Circles, Theorems and Problems: Table of Content 1/8

Second Ajima-Malfatti Point
Interactive illustration.
Tangent circles.

First Ajima-Malfatti Point
Animated illustration.
Tangent circles.

Sawayama -Thebault's theorem
Tangent circles.

Apollonius' Problem for Three Circles Illustration with animation and sound.
Tangent circles

Seven Circles Theorem
Tangent circles.

Soddy Circles and Descartes Theorem.
Three tangent circles, Inscribed and Circumscribed Circles, Radii.

Arbelos, Theorems and Problems
Three tangent semicircles with collinear centers.
Index 

GeoGebra, Dynamic Geometry, Euclidean Egg with 8 Arcs in 5 Steps, Step-by-Step Construction
HTML5 Animation for Tablets (iPad, Nexus)

GeoGebra, Dynamic Geometry, Euclidean Egg, Step-by-Step Construction
HTML5 Animation for Tablets (iPad, Nexus)

Geometry Problem 1048.
Circles, Tangent, Perpendicular, Diameter, Metric Relations.

Geometry Problem 1009.
Tangent Circles, Common External Tangent, Common Internal Tangent, Arithmetic Mean.

Geometry Problem 1008.
Three Equal Tangent Circles, Sum of Tangent Lines, Tangency Points.

Geometry Problem 1006.
Tangent Circles, Common External Tangent, Bicentric Trapezoid, Incenter, Circumcenter.

Geometry Problem 989.
Arbelos, Semicircles, Diameter, Perpendicular, 90 Degree, Common External Tangent, Rectangle, Midpoint of Arc.

Geometry Problem 987.
Triangle, Circumcircle, Incenter, Chord, Parallel, Circle, Tangent. GeoGebra, HTML5 Animation for Tablets (iPad, Nexus).

Geometry Problem 952.
Triangle, Incenter, Circumcenter, Three Equal Circles, Tangent Line, Tangent Circles, Collinear Points.

Geometry Problem 941.
Circles Tangent Externally, Tangent, Secant, Proportion, Angle.

Geometry Problem 936.
Circle, Semicircle, Diameter, Tangent, Radius, Chord, Metric Relations.

Geometry Problem 823.
Tangent Circles, Diameter, Perpendicular, Chord, Secant, Triangle, Area, Tangency Point.

Geometry Problem 815.
Triangle, Incircle, Semicircles, Tangent, Arbelos, Area.

Geometry Problem 812.
Four Tangent Circles, Common Tangent Line, Diameter, Area, Collinear Centers.

Geometry Problem 798
Parallelogram, Secant Line, Tangent Circles, Circumcircles, Triangle.

Geometry Problem 787
Right Triangle, Inradius, 18 Equal Circles, Line Tangent, Legs, Hypotenuse, Ratio, Metric Relations.

Geometry Problem 713.
Tangent Circles, Diameter, Chord, Tangent, Incenter, Incircle, Triangle.

Geometry Problem 708.
Circle, Tangent, Intersecting, Lune, Area, Diameter.

Geometry Problem 673.
Internally tangent circles, Chord, Tangent, Metric Relations.

Geometry Problem 672.
Internally tangent circles, Chord, Tangent, Geometric Mean.

Geometry Problem 650.
Tangent Circles, Diameter, Radius, Chord, Perpendicular.

Geometry Problem 639
Semicircle, Diameter, Perpendicular, Inscribed Circle, Tangent, Arbelos, Congruence.

Geometry Problem 637
Semicircle, Diameter, Perpendicular, Inscribed Circle, Chord, Tangent, Arbelos.

Geometry Problem 636
Semicircle, Diameter, Perpendicular, Inscribed Circle, Common Tangent.

Problem 635
Semicircle, Diameter, Perpendicular, Inscribed Circle, Radius.

Problem 572.
Right triangle, Median, Circle, Diameter, Excircle, Tangent circles.

Problem 523.
Tangent Circles, Diameter Perpendicular, Collinearity.

Problem 490.
Tangent Circles, Arc, Radius, Circular Sector, Area.

Proposed Problem 461.
Three Circles, Tangent, Right Angle, Center, Distance, Measurement.

Proposed Problem 460.
Circle, Tangent, Perpendicular, Radius, Distance, Measurement.

Proposed Problem 458.
Square, Semicircle, Circular Sector, Internal Common Tangent, Measurement.

Proposed Problem 456.
Three tangent circles, Center, Chord, Secant, Collinear.

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