Geometry Angles,Theorems and Problems - 1
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Euclid's Elements
Book I, 23 Definitions. One-page visual illustration. Angles and more.
Euclid's Elements Book.
Index. |
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Points, Theorems and Problems - Index.
Vertex. |
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Acute Angle in the Real World - Slideshow. |
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Meanings and syntactic of 'ANGLE'.
Created using Wordflex Touch Dictionary for iPad in association with Oxford University Press. |
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Obtuse Angle. Theorems and Problems. |
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Angles: 30, 60, 120 degrees. |
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Angles: 45, 135 degrees. |
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Angle Bisector. |
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Isogonal Lines.
Theorems and Problems. |
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Billiards and Geometry -
Index
Angles of Incidence and Reflection. |
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Book I, Proposition 9: Bisect a given angle
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Incenter. Index.
Angle bisectors.
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Excenter. Index.
Interior and Exterior Angle bisectors.
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Inca
Stone of Twelve Angles, Cuzco.
Tunnel effect. |
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Euclid's Elements Book VI, Proposition 3: Angle Bisector Theorem |
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Animated
illustration of the celebrated Morley's angle trisector theorem |
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Morley's Triangle & Center: Trisection of angles. |
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Blanchet Theorem.
Altitude, Angle Bisector.
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Isogonic-Jacobi
Theorem: Using TracenPoche Dynamic
Geometry Software |
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Mascheroni
Construction with compass alone. Midpoint of a segment. Equal
angles. |
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Interactive Simson
Line. Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.
Vertical angles. |
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Triangle: Incircle, Perpendicular, Angle Bisector.
Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation. |
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Geometry
Problem 1491.
Cyclic Quadrilateral, Diagonal, Incircle, Angle, Measurement. |
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Geometry
Problem 1490.
Triangle, Cevian, Incircle, Tangent, Measurement. |
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Geometry Problem 1442.
Triangle, Altitudes, Orthocenter, Perpendicular, Congruent Angles,
Similarity, Measurement, Art, Poster, Typography, iPad Apps. |
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Geometry Problem 1431.
Triangle, Circumcircle, Parallel Chord, Apollonius, LLC, Congruent Angles, Poster, Conformal Mapping. |
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Geometry Problem 1429. Triangle, Median, 15-30 degree, Angle, Congruence. |
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Geometry Problem 1423. Triangle, Area, Three Equal Angles, Circumradius, Measurement. |
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Geometry Problem 1418. Triangle, Circumcircle, Incenter, Side, Sum of Segments, Tangent, Parallel, Angle. |
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Geometry Problem 1399.
Triangle, Circumcircle, Perpendiculars, Angles, Congruence, Cyclic Quadrilateral. |
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Geometry Problem 1364.
Square, Inscribed Circle, Area, Angle Bisector, Perpendicular, 45 Degrees, Sketch, iPad Apps. |
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Geometry Problem 1363.
Square, Angle Bisector, Perpendicular, 45 Degrees, Angle, Sketch, iPad Apps. |
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Geometry Problem 1361.
Triangle, Two Nine-Point Circles, Feuerbach's Circle, Euler's Circle, Congruent Angles, Sketch, iPad Apps. |
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Geometry Problem 1359.
Triangle, Circumcircle, Congruent Angles, Midpoints. |
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Geometry Problem 1347. Triangle, Angle Bisector, Congruence, Circumcircle, Tangent, Equilateral Triangle. |
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Problem 1341.
Geometry Problem 1341: Isosceles Triangle, 80-20-80 Degrees, Circumcenter, Angle Bisector.
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Problem 1338.
Four Squares, Diagonals, Angle, 45 Degrees, Areas.
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Problem 1336.
Right Triangle, Cevian, Double Angle, Perpendicular, 90 Degrees.
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Geometry Problem 1329.
Two Squares Side by Side, Parallel, Perpendicular, 90 Degrees, Congruence. |
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Geometry Problem 1328.
Two Squares Side by Side, Perpendicular, 90 Degrees, Congruence. |
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Geometry Problem 1327.
Two Squares Side by Side, Perpendicular, 90 Degrees, Angle. |
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Geometry Problem 1326.
Triangle, Cevian, Incenters, Sum of Angles, 270 Degrees. |
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Geometry Problem 1324.
Quadrilateral, Diagonal, 45 Degrees, Angle Bisector, Isosceles Triangle, Congruence. |
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Geometry Problem 1323.
Square, Angle Trisector, Diagonal, Regular Dodecagon, Area, 30-60 degrees. |
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Geometry Problem 1322.
Triangle, Angle Bisector, Circumcircle, Chord, Secant, Sum of two Angles. |
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Geometry Problem 1299.
Triangles, Interior Point, Angles, 30 degrees. |
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Geometry Problem 1298.
Arbelos, Semicircles, Diameters, Circle, Incircle, Tangent, Angle Bisector, Perpendicular, Midpoint. |
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Geometry Problem 1297.
Arbelos, Semicircles, Diameters, Circle, Incircle, Tangent, Angle Bisector. |
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Geometry Problem 1295.
Right Triangle, Incenter, Incircle, Excenter, Excircle, Congruence, Angle. |
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Geometry Problem 1288.
Triangle, 30-50-100 Degrees, Area, Inradius, Metric Relations, Measurement. |
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Geometry Problem 1287.
Triangle, 40-100-40 Degrees, Congruence, Area, Metric Relations, Measurement. |
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Geometry Problem 1286.
Triangle, Quadrilateral, 60, 135, 105 Degree Angles, Congruence, Measurement. |
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Geometry Problem 1285.
Triangle, Quadrilateral, 60, 150, 90 Degree Angles, Congruence, Measurement. |
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Geometry Problem 1281.
Triangle, Circle, Diameter, Tangent, Altitude, Congruent Angles. |
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Geometry Problem 1274.
Isosceles Triangle, 80-20-80 Degrees, Area, Inradius, Circumradius, Angle Bisector, Metric Relations, Measurement. |
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| by Antonio Gutierrez
Last updated:
Mar 9, 2022
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