
Circle Tangent Line  Index,
Page 1




Incircle of a triangle.
Index.
Tangent line to a circle


Excircle.
Index.
Tangent line to circle.


Lemoine Line Theorem,
Interactive illustration.
HTML5 Animation for iPad and Nexus 

GeoGebra, Dynamic Geometry:
Lemoine Line
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) 

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

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

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

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

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

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

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

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

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

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

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

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

Geometry Problem 1354. Circle, Tangent Lines, Secant, Chord, Center, Parallel Lines. 

Geometry Problem 1347. Triangle, Angle Bisector, Congruence, Circumcircle, Tangent, Equilateral Triangle. 

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


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


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


Problem 1337.
Parallelogram, Diagonals, Circle, Circumcircle, Tangent Line, Triangle, Congruence.


Geometry Problem 1320.
Triangle, Incircle, Tangent, Chord, Circle, Parallel, Perpendicular, Collinearity. 

Geometry Problem 1317.
Triangle, Excircle, Chord, Tangent, Midpoint, Arc, Sum of two Segments, Congruence. 

Geometry Problem 1316.
Triangle, Incircle, Tangent, Chord, Midpoint, Sum of two Segments, Congruence. 

Geometry Problem 1315.
Triangle, Incircle, Tangent, Chord, Circle, Congruence. 

Geometry Problem 1314.
Equilateral Triangle, Incircle, Inscribed Circle, Tangent, Congruence. 

Geometry Problem 1309.
Triangle, Circle, Inradius, Excircle, Tangent, Exradius, Measurement. 

Geometry Problem 1308.
Quadrilateral, Diagonal, Triangle, Incircle, Tangent Line, Sides, Measurement. 

Geometry Problem 1306.
Cyclic, Inscribed Quadrilateral, Circle, Tangent, Diagonals, Collinear Points. 

Geometry Problem 1292.
Square, Circle, Right Triangle, Arc, Inradius, Radius, Incircle, Measurement. 

Geometry Problem 1281.
Triangle, Circle, Diameter, Tangent, Altitude, Congruent Angles. 

Geometry Problem 1277.
Equilateral Triangle, Circumcircle, Externally Tangent Circles, Tangent Line, Measurement. 

Geometry Problem 1276.
Equilateral Triangle, Circumcircle, Internally Tangent Circles, Tangent Line, Measurement. 

Geometry Problem 1271.
Triangle, Incircle, Incenter, Excircle, Excenter, Escribed Circle, Tangency Points, Six Concyclic Points. 

Geometry Problem 1270.
Triangle, Excircle, Excenter, Escribed Circle, Tangency Points, Perpendicular, 90 Degrees, Angle Bisector. 

Geometry Problem 1269.
Triangle, Incircle, Incenter, Inscribed Circle, Tangency Points, Perpendicular, 90 Degrees, Angle Bisector. 

Geometry Problem 1229
Three Tangent Circles, Midpoint, Common Tangent Line, 345 Right Triangle. 

Geometry Problem 1228
Three Tangent Circles, Midpoint, Major Arc, Common Tangent Line, Square. 

Geometry Problem 1221
Intersecting Circles, Chord, Tangent, Parallel Chords, Collinear Points. 

Geometry Problem 1217
Triangle, Circle, Excenter, Incenter, Angle Bisector, Cyclic Quadrilateral, Circumcircle, Tangent Line. 

Geometry Problem 1210
Circle, Tangent Line, Secant, Chord, Collinear Points. 

Geometry Problem 1193
345 Right Triangle, Congruent Circles, Tangent, Radius. 

Geometry Problem 1189
Circle, Tangent Line, Secant, Chord, Collinear Points. 

Geometry Problem 1186
Right Triangle, Square, Inscribed Circle, Tangent, Quadrilateral, Area. 

Geometry Problem 1184
Right Triangle, Square, Inscribed Circle, Tangent, Concurrent Lines. 

Geometry Problem 1183
Parallelogram, Diagonals, Circle, Tangent Line. 

Geometry Problem 1181
Cyclic Quadrilateral and Tangential Quadrilateral, Diameter as a Diagonal, Incenter, Circumcenter. 

Geometry Problem 1158.
Four Tangent Circles, Tangent Chord, Radius, Metric Relations. 

Geometry Problem 1156.
Square, Tangent Line, 90 Degrees, Metric Relations. 

Geometry Problem 1154. Sangaku: Three circles and a tangent line. 

Geometry Problem 1149.
Isosceles Triangle, Altitude, Cevian, Incircles, Tangent, Congruence. 

Geometry Problem 1143.
Triangle, Circumcircle, Tangent Line, Reflection of a Point over a Line, Tangent Circles, Collinear Points. 

Geometry Problem 1134.
Tangent Circles, Tangent Line, Triangle, Circumcircle, Circumcenter. 

Geometry Problem 1133.
Circle, Chord, Tangent, Circumcircle, Similarity, Equal Product. 

Geometry Problem 1132.
Triangle, Excircle, Tangency Point, Parallel, Midpoint. 

Geometry Problem 1127.
Triangle, Circumcircle, Tangent, Circle, Diameter, Midpoint, Perpendicular, 90 Degrees. 

Geometry Problem
1107.
Triangle, Circumcircle, Circle, Radius, Tangent, Chord, Congruence. 

Geometry Problem
1105.
Triangle, Incircle, Excircle, Cevian, Tangent, Congruence, Geometric Mean. 

Geometry Problem
1104.
Right Triangle, Incircle, Circumcircle, Inscribed Circle, Radius,
Tangent. 

Geometry Problem
1103.
Right Triangle, Incircle, Inscribed Circle, Radius, Geometric Mean, Sangaku, Japanese, Metric Relations. 
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Last updated: Dec 12, 2018 by Antonio Gutierrez
