Geometry: Marion Walter's Theorem and
Related Topics
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![Marion Walter's theorem and related topics](marion_walter_theorem_index.jpg) |
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![Marion Walter's Theorem](../problem/p122_marion_walter_proof_17.jpg) |
Marion Walter's Theorem, Problem 122.
Area of triangle and Hexagon, Trisection of Sides.
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![](marion_walter_theorem.jpg) |
Marion
Walter's Theorem: Triangle and Hexagon areas:
Using TracenPoche Dynamic Geometry Software. |
![](../problem/p061_mw_triangle_trisect_1.jpg) |
Problem 61: Triangle, Trisection
of Sides |
![](../puzzle/marion_walter_theorem_17.jpg) |
Puzzle: Marion Walter's theorem. Puzzle cut: 12 Piece ZigZag
Based on
Marion Walter's theorem |
![Elearning 125: Area](../problem/p125_triangle_star_17.jpg) |
Problem
125. Area of Triangle, Star,
Trisection of Sides.
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![Elearning 124: Triangle Area, Similarity](../problem/p124_triangle_similarity_17.jpg) |
Problem 124. Area of triangle,
Similarity, Trisection of Sides.
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![Elearning 123: Triangle Similarity, Area](../problem/p123_triangle_similarity_17.jpg) |
Problem 123. Area of triangle,
Similarity, Trisection of Sides.
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![Elearning 121: Similarity and Area](../problem/p121_triangle_similarity_17.jpg) |
Problem
121. Similarity and Area
of triangle, Trisection of Sides.
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![Ceva's Theorem](ceva_theorem_cl_17.jpg) |
Ceva's Theorem.
Concurrency. Interactive proof with animation. Key concept:
Menelaus Theorem. |
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Menelaus' Theorem. Interactive proof with
animation and key concepts.
Transversal line.
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![Routh's theorem index](routh's_theorem_index_17.jpg) |
Routh's Theorem - Index
Triangle, Cevians, Area, Ratio.
Transversal line. |
![Routh's Theorem 1](routh's_theorem_1_17.jpg) |
Routh's Theorem 1.
Triangle, Cevians, Ratio of Areas. |
![Routh's theorem: Triangle, Cevians, Area Ratio](routh's_theorem_2_17.jpg) |
Routh's Theorem 2.
Triangle, Cevians, Ratio of Areas. |
![ROuth's Theorem 3: Triangle, Cevians, Ratio Area](routh's_theorem_3_17.jpg) |
Routh's Theorem 3.
Triangle, Cevians, Ratio of Areas. |
![Routh's theorem 4: Triangle, Cevians, Area](routh's_theorem_4_17.jpg) |
Routh's Theorem 4.
Triangle, Cevians, Ratio of Areas. |
![Quadrilateral, transversal, ratio, similarity](../problem/p434_quadrilateral_ratio_1.jpg) |
Problem 434.
Quadrilateral, Transversal, Ratio, Measurement, Similarity. |
![Parallelogram, Area](../problem/p398_area_parallelogram_17.jpg) |
Problem
398.
Parallelogram, Area, Similarity, Congruence. |
![Octagon, Square](../problem/p286_square_octagon_17.jpg) |
Problem 286: Square, Midpoints, Octagon. |
![Square, Midpoint, Congruence, Pythagoras](../problem/p239_square_midpoint_17.jpg) |
Problem 239. Square, Midpoints, Lines, Congruence, Pythagoras.
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![Geometry problem 178 Quadrilateral area](../problem/p178_quadrilateral_area_17.jpg) |
Problem 178. Quadrilateral,
Trisection of sides, Area. |
![Elearning 177: Parallelogram with midpoints, Area](../problem/p177_parallelogram_area_17.jpg) |
Problem 177. Parallelogram with
Midpoints, Triangles, Areas. |
![Elearning 176: Quadrilateral Area Problem](../problem/p176_quadrilateral_area_17.jpg) |
Problem 176. Quadrilateral with
Midpoints, Triangles, Areas.
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![Elearning 175: Quadrilateral Area Problem](../problem/p175_quadrilateral_area_17.jpg) |
Problem 175. Quadrilateral with
Midpoints, Areas.
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![Quadrilateral with Midpoints, Triangles Area](../problem/p174_quadrilateral_area_17.jpg) |
Problem 174. Quadrilateral with
Midpoints, Triangles, Areas.
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![Quadrilateral with Midpoints, Triangles Area](../problem/p173_quadrilateral_area_17.jpg) |
Problem 173. Quadrilateral with
Midpoints, Triangles, Areas.
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![Elearning 172: Trapezoid, Quadrilateral, Area](../problem/p172_trapezoid_quadrilatera.jpg) |
Problem 172. Trapezoid,
Midpoints, Quadrilaterals, Areas.
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![Elearning 172: Trapezoid, Midpoints, Quadrilaterals, Areas](../problem/p171_trapezoid_triangle_17.jpg) |
Problem 171. Trapezoid,
Midpoints, Triangles, Areas.
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![Geometry Problem: Parallelogram, Triangles, Pentagon, Area](../problem/p169_parallelogram_area_17.jpg) |
Problem 169.
Parallelogram, Interior and Exterior Points, Diagonals, Pentagon,
Triangles, Areas.
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![Geometry Problem: Parallelogram, Triangles, Pentagon, Area](../problem/p168_parallelogram_area_17.jpg) |
Problem 168. Parallelogram,
Diagonal, Triangles, Pentagon, Areas.
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![Geometry Problem: Parallelogram, Triangles, Area](../problem/p167_parallelogram_area_17.jpg) |
Problem 167. Parallelogram,
Diagonal, Triangles, Areas.
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![Geometry Problem: Parallelogram, Triangles, Area](../problem/p166_parallelogram_area_17.jpg) |
Problem 166. Parallelogram,
Diagonal, Triangles, Areas.
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![Elearning 165: Parallelogram area](../problem/p165_parallelogram_area_17.jpg) |
Problem 165. Parallelogram,
Diagonal, Triangles, Areas.
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![Elearning 164: Parallelogram, Triangles, Area](../problem/p164_parallelogram_area_17.jpg) |
Problem 164. Parallelogram,
Trapezoid, Diagonal, Triangles, Areas.
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![Elearning 163 Trapezoid, Triangles, Area](../problem/p163_trapezoid_triangle_17.jpg) |
Problem 163. Trapezoid,
Diagonals, Triangles, Areas.
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![Elearning 162 Parallelogram and Triangles Areas](../problem/p162_parallelogram_area_17.jpg) |
Problem 162. Parallelogram,
Triangles, Areas.
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![Elearning 161 Parallelogram and Octagon Areas](../problem/p161_parallelogram_area_17.jpg) |
Problem 161. Parallelogram,
Midpoints, Octagon, Areas.
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![Quadrilateral area, trisection](../problem/p151_quadrilateral_area_17.jpg) |
Problem 151. Quadrilateral, Area,
Trisection of Sides.
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![Quadrilateral area, trisection](../problem/p150_quadrilateral_area_17.jpg) |
Problem 150. Quadrilateral, Area,
Trisection of Sides.
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![Quadrilateral Area, Midpoint, Elearning](../problem/p149_quadrilateral_area_17.jpg) |
Problem 149. Quadrilateral, Area,
Midpoints.
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![Quadrilateral area, Midpoint, Elearning](../problem/p148_quadrilateral_area_17.jpg) |
Problem 148. Quadrilateral, Area,
Midpoints.
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![Quadrilateral Area, Elearning](../problem/p147_quadrilateral_area_17.jpg) |
Problem 147. Quadrilateral, Area,
Midpoints, Triangle.
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![Contact Triangle Area. Elearning.](../problem/p110_area_contact_triangle_17.jpg) |
Problem 110. Area of Contact
Triangle.
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