College Geometry Online, eLearning

Plane Geometry: Parallelogram Theorems and Problems. Page 3

Parallelogram GoGeometry Collection

Parallelogram, Theorems and Problems - 3

Parallelograms Index

 

Triangle area, parallel, concurrency

Problem 471.
Triangle, Parallel, Side, Concurrency, Area, Similarity.

Triangle area, Similarity

Problem 470.
Triangle, Parallel, Side, Parallelogram, Area, Similarity.

Cyclic quadrilateral, Orthocenter, Parallelogram, Congruence

Proposed Problem 413.
Cyclic Quadrilateral, Orthocenter, Parallelogram, Concurrency, Congruence.

Cyclic quadrilateral, Perpendicular, Parallelogram, Congruence

Proposed Problem 408.
Cyclic quadrilateral, Perpendicular, Parallelogram, Congruence.

Parallelogram, Area

Proposed Problem 398.
Parallelogram, Area, Similarity, Congruence.

Triangle, Altitude

Proposed Problem 397.
Triangle, Altitude, Midpoints, Congruence.

Square, Angle trisectors

Proposed Problem 396.
Square, Angle Trisectors, Congruence, Area.

Square, 15 degree

Proposed Problem 395.
Square, 15 Degree, Equilateral triangle.

Circular sector 60 degrees

Proposed Problem 365.
Circular Sector of 60 degrees, Midpoints, Perpendicular, Congruence.

Cyclic quadrilateral, Rhombus

Proposed Problem 359.
Cyclic quadrilateral, Angle bisector, Rhombus.

Rhombus, Square 

Proposed Problem 354.
Rhombus, Square, 45 degrees.

Rhombus, Circumscribable quadrilateral

Proposed Problem 351.
Rhombus, Incircles, Common tangent, Circumscribable or Tangential quadrilateral.

Triangle, Incircle, Parallel, Midpoint

Proposed Problem 328.
Triangle, Incircle, Tangency Points, Parallel, Midpoint. Parallelogram.

Triangle, Parallel, Congruence, Similarity

Proposed Problem 292.
Triangle, Parallel, Congruence, Similarity. Parallelogram.

Elearning 251: Parallelogram

Proposed Problem 251.
Parallelogram, sides, diagonals, squares, areas.

Elearning 245: Parallelogram

Proposed Problem 245. Parallelogram with Equilateral triangles

Elearning 244: Square center, diagonal

Proposed Problem 244. Square, Diagonals, Centers, Distance.

Elearning 243

Proposed Problem 243. Triangle with Equilateral triangles, Parallelogram.

Elearn 242: Equilateral triangle and parallelogram

Proposed Problem 242. Triangle with Equilateral triangles, Parallelogram.

Triangle with equilateral triangles

Proposed Problem 240. Triangle with Equilateral triangles, Parallelogram.

Square, Midpoint, Congruence, Pythagoras

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

Square. Midpoint, Congruence

Proposed Problem 238. Square, Midpoints, Lines, Congruence.

Problem about Parallelogram and transversal

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

Problem 233: Parallelogram

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

Elearn 232: Parallelogram

Proposed Problem 233. Parallelogram, Exterior line, Perpendicular lines.

Elearn 232: Parallelogram, perpendicular lines

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

Rhomus problem

Proposed Problem 219. Rhombus, perpendiculars, arithmetic mean.

Archimedes Arbelos and Square

Archimedes Arbelos and Square 2. Dynamic Geometry Software.
Step-by-Step construction, Manipulation, and animation.

Archimedes Arbelos and Square

Archimedes Arbelos and Square 1. Dynamic Geometry Software.
Step-by-Step construction, Manipulation, and animation.

Geometry problems 201-210

 

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