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Recent Additions (Page 48 of 80)




Proposed Problem 235. Parallelogram, Transversal line, Perpendicular
lines.


Proposed Problem 234. Parallelogram, Line through a vertex,
Perpendicular lines.


Parallelograms Index.


Proposed Problem 232. Parallelogram, Line through a vertex,
Perpendicular lines.


Proposed Problem 231. Triangle, Midpoints, Transversal,
Perpendicular lines.


Proposed Problem 230. Triangle, Midpoints, Transversal,
Perpendicular lines.


Proposed Problem 229. Triangle, Centroid, Transversal, Perpendicular
lines.


Proposed Problem 228. Triangle, Midpoints, Exterior line,
Perpendiculars lines.


Proposed Problem 227. Triangle, Centroid, Exterior line,
Perpendicular lines.


Proposed Problem 226. Triangle, Centroid, Perpendiculars.


Problemas Propuestos de Geometria en Espanol.


Proposed Problem 225. Viviani's Theorem Extension, Regular Polygon,
Apothem, Distance.


Crops of the Incas, interactive mind map.
Selected by the National Research Council Ad
Hoc Panel, National Academy Press Washington. D.C.


Kaleidoscope Index.


Proposed Problem 224. Viviani's theorem, Isosceles triangle,
Altitude, Distances, Point on the extension of the base.


Proposed Problem 223. Viviani's theorem, Isosceles triangle,
Altitude, Distances.


Proposed Problem 222. Viviani's theorem, Equilateral triangle,
Exterior point, Distances.


Proposed Problem 221. Viviani's theorem, Equilateral triangle,
Interior point, Distances.


Classical Theorems.


UNESCO World Heritage List, Interactive Mind Map.
As of 2008, 878 sites are listed. Peru is home of 10 sites.
Inca News Index.
..


Proposed Problem 220. Right Triangle, Altitude, Angle Bisector,
Distance, Arithmetic Mean.


Proposed Problem 219. Rhombus, perpendiculars, arithmetic mean.


Proposed Problem 218. Right triangle, Altitude and Projections.


Proposed Problem 217. Right triangle, Altitude and Projections.


Proposed Problem 216. Quadrilateral, Angle Bisectors, and
Concurrency.


Proposed Problem 215.
Quadrilateral, Angle Bisectors, and Cyclic Quadrilateral.


Proposed Problem 214.
Quadrilateral and Angle Bisectors.


Problem Solving Interactive Mind Map.


Critical Thinking Interactive Mind Map.

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