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Online Geometry: Congruence, Rotation, Translation, Reflection - Page 5
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![Congruence, Translation, Rotation, Reflection](congruence_geometry_17.jpg) |
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![Triangle, Parallel, Angle Bisector](../problem/p625_triangle_bisector_1.jpg) |
Geometry Problem 625
Triangle, Parallel Lines, Congruence, Angle Bisector. |
![Triangle, Altitude, Congruence](../problem/p612_altitude_triangle_1.jpg) |
Geometry Problem
612
Altitude of a Triangle, Perpendicular, Congruence. |
![Bottema Theorem. Elearning.](bottema_theorem_elearning.jpg) |
Bottema's Theorem:
Triangle and Squares with Interactive Geometry Software
Step-by-Step construction, Manipulation, and animation. |
![Square with Right triangles](../problem/p608_square_triangle_1.jpg) |
Geometry Problem
608
Square with Right Triangles, Metric Relations, Congruence, Measurement. |
![Triangle, Incircle, Inradius, Midpoint, Concurrency](../problem/p592_triangle_incenter_1.jpg) |
Geometry Problem
592.
Triangle, Incenter, Incircle, Tangency Point, Midpoints, Concurrent Lines, Congruence. |
![Triangle, Incircle, Inradius, Altitude, Midpoint](../problem/p591_triangle_incenter_1.jpg) |
Geometry Problem
591.
Triangle, Incenter, Incircle, Inradius, Tangency Point, Midpoint, Altitude. |
![Online education: Geometry Problem 570, Collinearity](../problem/p570_square_collinearity_1.jpg) |
Problem
570.
Square, Center, Right Triangles, Congruence, Collinearity. |
![Quadrilateral, Excircles](../problem/p569_quadrilateral_circle_1.jpg) |
Problem
569.
Quadrilateral, Excircles, Tangency Points, Congruence. |
![Triangle, Excircles, Congruence](../problem/p568_quadrilateral_circle_1.jpg) |
Problem
568.
Triangle, Excircles, Tangency Point, Congruence. |
![Equilateral triangles](../problem/p404_equilateral_triangle_1.jpg) |
Proposed Problem 404.
External Equilateral triangles, Congruent and Concurrent Lines. |
![Hexagon, Centroids](../problem/p402_hexagon_centroid_17.jpg) |
Proposed Problem 402.
Hexagon, Triangle, Centroid, Parallel, Congruence, Similarity. |
![Area of a triangle, Circumcircle, Angle Bisector](../problem/p401_area_triangle_17.jpg) |
Proposed Problem 401.
Area, Triangle, Angle bisector, Circumcircle, Perpendicular bisector,
Congruence. |
![Triangle, Angle Bisector, Circumcircle](../problem/p400_triangle_circle_17.jpg) |
Proposed Problem 400.
Triangle, Angle bisector, Circumcircle, Perpendicular, Congruence. |
![RIght triangle, Midpoints, Distance](../problem/p399_right_triangle_17.jpg) |
Proposed Problem 399.
Right triangle, Midpoints, Distance, Pythagorean theorem, Congruence. |
![Parallelogram, Area](../problem/p398_area_parallelogram_17.jpg) |
Proposed
Problem 398.
Parallelogram, Area, Similarity, Congruence. |
![Triangle, Altitude](../problem/p397_triangle_midpoint_17.jpg) |
Proposed Problem 397.
Triangle, Altitude, Midpoints, Congruence. |
![Square, Angle trisectors](../problem/p396_square_trisector_17.jpg) |
Proposed Problem 396.
Square, Angle Trisectors, Congruence, Area. |
![Square, Circle](../problem/p394_square_circle_17.jpg) |
Proposed Problem 394.
Square, 90 Degree Arc, Diagonal, Congruence. |
![Right triangle, Congruence, Angles](../problem/p363_right_triangle_17.jpg) |
Proposed Problem 363.
Right triangle, Congruence, Angles. |
![Isosceles triangle 80 80 20](../problem/p358_triangle_80_80_20_17.jpg) |
Proposed Problem 358.
Isosceles triangle 80-80-20, Circle, Angles, Congruence. |
![Isoscele triangle 80-80-20](../problem/p274_triangle_80_20_17.jpg) |
Proposed Problem 274.
Isosceles Triangle, 80-80-20, Angles. |
![](../equilic_quadrilateral_170.jpg) |
Equilic Quadrilateral.
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![Rhomus problem](../problem/p219_rhombus_mean_17.jpg) |
Proposed Problem 219. Rhombus, perpendiculars, arithmetic mean.
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![Elearn 218: Right triangle](../problem/p218_right_triangle_17.jpg) |
Proposed Problem 218. Right triangle, Altitude and Projections.
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![Elearn 217: Right triangle, Altitude, Projections](../problem/p217_right_triangle_17.jpg) |
Proposed Problem 217. Right triangle, Altitude and Projections.
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![Elearning 187: Right triangle, incircles, angles](../problem/p187_right_triangle_17.jpg) |
Proposed Problem 187. Right
Triangle, Altitude, Incenters, Circles, Angles. |
![Elearning 186: Right triangle, circles](../problem/p186_right_triangle_17.jpg) |
Proposed Problem 186. Right
Triangle, Altitude, Incenters, Circles. |
![Trapezoid and triangle problem](../problem/p185_trapezoid_angle_17.jpg) |
Proposed Problem 185. Trapezoid,
Triangles and Angles. |
![Elearning: Triangle, Angle](../problem/p184_triangle_angle_17.jpg) |
Proposed Problem 184. Triangle
and Angles. |
![Geometry Problem 158](../problem/p158_elearning_triangle_17.jpg) |
Proposed Problem 158. Relation
between the Circumradius, Inradius and Exradii of a triangle. |
![Quadrilateral Area, Elearning](../problem/p147_quadrilateral_area_17.jpg) |
Proposed Problem 147.
Quadrilateral, Area, Midpoints, Triangle.
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![Geometry Problem 135](../problem/p135_orthic_triangle_17.jpg) |
Proposed Problem 135. Orthic
Triangle, Altitudes, Perpendicular, Parallel |
![Elearning 132](../problem/p132_triangle_orthocenter.jpg) |
Proposed Problem 132.
Triangle, 60 degree, Orthocenter, Congruence, Midpoint.
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![](../triangle_squares_1_170.jpg) |
Triangle with Squares
Problem
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![Problem 109. Elearning.](../problem/p109_angle_right_triangle_17.jpg) |
Proposed Problem 109. Angles,
Right Triangle, Cevian. |
![Elearning 107.](../problem/p107_angle_triangle_17.jpg) |
Proposed Problem 107. Angles,
Triangle. Cevian. |
![Problem 106, Elearning](../problem/p106_angle_triangle_17.jpg) |
Proposed Problem 106. Angles,
Triangle. Cevian. |
![Pythagoras curiosity. Online tutoring.](../pythagoras/pythagoras_curiosity_17.jpg) |
The Pythagorean Curiosity
Triangles and squares, fifteen conclusions. |
![Elearning 103.](../problem/p103_equilateral_area_17.jpg) |
Proposed Problem 103.Equilateral
Triangle Area, Interior Point, Heron's Formula. |
![Triangle Square Theorem 1. Elearning, Online Tutoring](triangle_square_01_17.jpg) |
Triangle
and Squares Theorem 1: with Interactive Geometry Software
Step-by-Step construction, Manipulation, and animation. |
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