College Geometry Online, eLearning

Geometry: Marion Walter's Theorem and Related Topics

Marion Walter's theorem and related topics

Marion Walter's Theorem

Marion Walter's Theorem, Problem 122.
Area of triangle and Hexagon, Trisection of Sides.

Marion Walter's Theorem: Triangle and Hexagon areas:
Using TracenPoche Dynamic Geometry Software.

Problem 61: Triangle, Trisection of Sides

Puzzle: Marion Walter's theorem. Puzzle cut: 12 Piece ZigZag
Based on Marion Walter's theorem

Elearning 125: Area

Problem 125. Area of Triangle, Star, Trisection of Sides.

Elearning 124: Triangle Area, Similarity

Problem 124. Area of triangle, Similarity, Trisection of Sides.

Elearning 123: Triangle Similarity, Area

Problem 123. Area of triangle, Similarity, Trisection of Sides.

Elearning 121: Similarity and Area

Problem 121. Similarity and Area of triangle, Trisection of Sides.

Ceva's Theorem

Ceva's Theorem. Concurrency. Interactive proof with animation. Key concept: Menelaus Theorem. 

Menelaus Theorem 

Menelaus' Theorem. Interactive proof with animation and key concepts.
Transversal line.

 

Routh's theorem index

Routh's Theorem - Index
Triangle, Cevians, Area, Ratio.
Transversal line. 

Routh's Theorem 1

Routh's Theorem 1.
Triangle, Cevians, Ratio of Areas.

Routh's theorem: Triangle, Cevians, Area Ratio

Routh's Theorem 2.
Triangle, Cevians, Ratio of Areas.

ROuth's Theorem 3: Triangle, Cevians, Ratio Area

Routh's Theorem 3.
Triangle, Cevians, Ratio of Areas.

Routh's theorem 4: Triangle, Cevians, Area

Routh's Theorem 4.
Triangle, Cevians, Ratio of Areas.

Quadrilateral, transversal, ratio, similarity

Problem 434.
Quadrilateral, Transversal, Ratio, Measurement, Similarity.

Parallelogram, Area

Problem 398.
Parallelogram, Area, Similarity, Congruence.

Octagon, Square

Problem 286: Square, Midpoints, Octagon.

Square, Midpoint, Congruence, Pythagoras

Problem 239. Square, Midpoints, Lines, Congruence, Pythagoras.

Geometry problem 178 Quadrilateral area

Problem 178. Quadrilateral, Trisection of sides, Area.  

Elearning 177: Parallelogram with midpoints, Area

Problem 177. Parallelogram with Midpoints, Triangles, Areas.  

Elearning 176: Quadrilateral Area Problem

Problem 176. Quadrilateral with Midpoints, Triangles, Areas.  

Elearning 175: Quadrilateral Area Problem

Problem 175. Quadrilateral with Midpoints, Areas.  

Quadrilateral with Midpoints, Triangles Area

Problem 174. Quadrilateral with Midpoints, Triangles, Areas.  

Quadrilateral with Midpoints, Triangles Area

Problem 173. Quadrilateral with Midpoints, Triangles, Areas.  

Elearning 172: Trapezoid, Quadrilateral, Area

Problem 172. Trapezoid, Midpoints, Quadrilaterals, Areas.  

Elearning 172: Trapezoid, Midpoints, Quadrilaterals, Areas

Problem 171. Trapezoid, Midpoints, Triangles, Areas.  

Geometry Problem: Parallelogram, Triangles, Pentagon, Area

Problem 169. Parallelogram, Interior and Exterior Points, Diagonals, Pentagon, Triangles, Areas.  

Geometry Problem: Parallelogram, Triangles, Pentagon, Area

Problem 168. Parallelogram, Diagonal, Triangles, Pentagon, Areas.  

Geometry Problem: Parallelogram, Triangles, Area

Problem 167. Parallelogram, Diagonal, Triangles, Areas.  

Geometry Problem: Parallelogram, Triangles, Area

Problem 166. Parallelogram, Diagonal, Triangles, Areas.  

Elearning 165: Parallelogram area

Problem 165. Parallelogram, Diagonal, Triangles, Areas.  

Elearning 164: Parallelogram, Triangles, Area

Problem 164. Parallelogram, Trapezoid, Diagonal, Triangles, Areas.  

Elearning 163 Trapezoid, Triangles, Area

Problem 163. Trapezoid, Diagonals, Triangles, Areas.  

Elearning 162 Parallelogram and Triangles Areas

Problem 162. Parallelogram, Triangles, Areas.  

Elearning 161 Parallelogram and Octagon Areas

Problem 161. Parallelogram, Midpoints, Octagon, Areas.  

Quadrilateral area, trisection

Problem 151. Quadrilateral, Area, Trisection of Sides.

Quadrilateral area, trisection

Problem 150. Quadrilateral, Area, Trisection of Sides.

Quadrilateral Area, Midpoint, Elearning

Problem 149. Quadrilateral, Area, Midpoints.

Quadrilateral area, Midpoint, Elearning

Problem 148. Quadrilateral, Area, Midpoints.

Quadrilateral Area, Elearning

Problem 147. Quadrilateral, Area, Midpoints, Triangle.

Contact Triangle Area. Elearning.

Problem 110. Area of Contact Triangle.

 

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