 |
|
|
|
|
Online Geometry: Congruence, Rotation, Translation, Reflection - Page 1
|
|
 |
|
|
 |
Euclid's Elements
Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book.
Index |
|
 |
Perpendicular
Bisector. |
|
 |
Kaleidoscope Index.
|
|
 |
Congruent
Triangles: SAS, SSS, ASA. Demonstrates with animation the various
relationships of angles and sides to congruency in triangles.
|
|
 |
Euclid's Elements Book I, Proposition 4: (Side-Angle-Side SAS) |
|
 |
Symmetry (1966).
Greatest film, a fantasy of dancing images breaking apart, spinning, and
converging. Produced by the University of Washington, the Commission on
College Physics, and the Polytechnic Institute of Brooklyn.
|
|
 |
Geoboard
for iPad Pythagorean Theorem Proof by Leonardo. |
|
 |
Geoboard
for iPad Pythagorean Theorem Proof, Squares (Problem 540). |
|
 |
Geoboard
for iPad Gallery: Triangle with two squares (Problem 496). |
|
 |
Semiperimeter and excircles of a triangle.
|
|
 |
Semiperimeter and incircle of a triangle. |
|
 |
Semiperimeter, incircle and excircles of a triangle.
|
|
 |
Parallelogram with Squares theorem Thébault's Theorem.
|
|
|
Johnson's Theorem,
Intersecting circles.
HTML5 Animation |
|
 |
Varignon and Wittenbauer parallelograms. Quadrilateral: midpoints and
trisection points of the edges.
|
|
 |
Van Aubel's Theorem.
Quadrilateral with Squares. Proof with animation.
|
|
 |
Langley's Problem
Adventitious angles. 20° isosceles triangle with animation.
|
|
 |
Geometry Problem 868
Cyclic Quadrilateral, Circle, Five Rectangles, Four Centers, Congruence. |
|
 |
Geometry Problem 867
Isosceles Triangle, Median, Perpendicular, Angle, Congruence. |
|
 |
Geometry Problem 866
Cyclic Quadrilateral, Circle, Rectangle, Center, Congruence, 90 Degrees. |
|
 |
Geometry Problem 860
Triangle, Three Medians, Parallel, Parallelogram, Area, Congruence. |
|
 |
Geometry Problem 859
Isosceles Right Triangle, Angles,18, 45 Degrees, Congruence, Perpendicular bisector. |
|
 |
Geometry Problem 858
Isosceles Right Triangle, Cevian, Ratio 2:1, 45 Degrees, Congruence, Angles, Auxiliary Lines. |
|
 |
Geometry Problem 857
Triangle, Median, Midpoint, Angles, 30, 45 Degrees, Congruence, Auxiliary Lines. |
|
 |
Geometry Problem 845
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity. |
|
 |
Geometry Problem 844
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity. |
|
 |
Geometry Problem 843
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Parallel, Congruence, Similarity. |
|
 |
Geometry Problem 842
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity. |
|
 |
Geometry Problem 841
Triangle, Medians, Centroid, Circumcenters, Perpendicular, Congruence, Similarity. |
|
 |
Geometry Problem 832
Quadrilateral, Isosceles triangle, 70-70-40 degrees, Congruence, Auxiliary lines, Equilateral triangle. |
|
 |
Geometry Problem 831
Quadrilateral, Diagonal, Midpoint, Opposite Angles, Congruence, Parallelogram. |
|
 |
Geometry Problem 794
Right Triangle, Altitude, Three Incenters, Circumcircles, Incircle, Congruence. |
|
 |
Geometry Problem 770
Parallelogram, Angle Bisector, Triangle, Circumcenter, Circumcircle, Angle Measurement. |
|
 |
Geometry Problem 769
Triangle, Circumcircle, Circumcenter, Orthocenter, Midpoint of arc, Parallel to chord, Congruence. |
|
 |
Geometry Problem 763
Parallelogram, Diagonal, Parallel, Congruence. |
|
 |
Geometry Problem 762
Parallelogram, Midpoint, Perpendicular, Congruence, Isosceles triangle. |
|
 |
Geometry Problem 759
Equilateral Triangle, Transversal, Trisection of sides, Congruence, Angle. |
|
 |
Geometry Problem 758
Equilateral Triangle, Cevians, Trisection of sides, Congruence, Perpendicular, 90 Degrees. |
|
 |
Geometry Problem
752.
Square, Circle, Tangent, Chord, Angle. |
|
 |
Geometry Problem
745.
Circle, 90 Degrees, Chord, Congruence, Perpendicular, Metric Relations. |
|
 |
Geometry Problem
735.
Triangle, Altitude, Perpendicular, Semiperimeter of the Orthic Triangle, Congruence. |
|
 |
Geometry Problem
734.
Triangle, Isosceles, Median, Parallel, Angle Bisector, Congruence, Midpoint. |
|
 |
Geometry Problem
733.
Triangle, Orthocenter, Altitude, Reflection in a line, Circumcircle, Concurrency. |
|
 |
Geometry Problem
732.
Triangle, Altitude, Orthic Triangle, Orthocenter, Congruence, Parallelogram. |
|
 |
Geometry Problem
728.
Triangle, Altitude, Perpendicular, Circumcircle, Midpoint, Intersecting Circles, Concurrency. |
|
 |
Geometry Problem
727.
Triangle, Isosceles, Congruence, Angles, Measurement. |
|
 |
Geometry Problem
710.
Parallelogram, Midpoint, Diagonal, Collinear Points, Metric Relations, Triangle, Similarity, Congruence. |
|
 |
Geometry Problem
703.
Triangle, Incircle, Tangency point, Diameter, Congruence. |
|
 |
Geometry Problem 697.
Square, Circle, Sector, Segment, Tangent, Inscribed, Congruence, Mind Map, Polya. |
|
 |
Geometry Problem 696.
Triangle, Angles, Auxiliary Construction, Congruence, Mind Map, Polya. |
|
 |
Geometry Problem 695.
Triangle, Angles, Auxiliary Construction, Congruence, Mind Map, Polya. |
|
 |
Geometry Problem 694.
Triangle, Angles, 30 Degrees, Auxiliary Construction, Mind Map, Polya. |
|
 |
Geometry Problem 691.
Isosceles Triangle, 80-80-20 Degrees, Angles, Congruence, Mind Map, Polya. |
|
 |
Geometry Problem 686.
Triangle, Three Excircles, Tangency points, Tangent lines, Semi-perimeter, Congruence. |
|
Previous |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
Next
|
|
|
|
|
|
 |
|