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Plane Geometry:
Parallelogram Theorems and
Problems. Page 1

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Parallelogram, Theorems and
Problems - 1
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Parallelogram
Definition. |
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Geometric Art:
Parallelogram for Kids, Delaunay Triangulation. |
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Parallelogram on blurred background of Machu Picchu. |
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Square.
Theorems and Problems Index. |
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Rectangle.
Theorems and Problems Index. |
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Area of a Parallelogram.
Theorems and Problems Index. |
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Geometry
Problem 1494.
Parallelogram, Midpoints, Octagon, Areas. |
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Geometry
Problem 1493.
Four Squares, Parallelogram, Auxiliary Lines. |
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Dynamic Geometry 1470.
Tangential Quadrilateral, Incircles, Tangent,
Parallel, Rhombus, Step-by-step Illustration. |
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Geometry Problem 1463.
Parallelogram, Interior Point, Opposite Triangles with Equal Sum of Areas.
Step-by-step Illustration using GeoGebra. |
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Geometry Problem 1435.
Circle, Diameter, Inscribed Circles, Circular Sector, Parallelogram, Parallel Lines, Tangency Points,
Poster, Typography, iPad Apps. |
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Geometry Problem 1424. Triangle, Parallelogram, Trapezoid, Area, Diagonal, Measurement. |
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Geometry Problem 1381. Parallelogram, Exterior Point, Triangle, Area. |
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Geometry Problem 1378. Parallelogram, Diagonal perpendicular to a side, Distances from a Point to Vertices, Measurement. |
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Problem 1339.
Circle, Diameter, Tangent, Secant, Parallelogram.
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Problem 1337.
Parallelogram, Diagonals, Circle, Circumcircle, Tangent Line, Triangle, Congruence.
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Geometry Problem 1279.
Parallelogram, Midpoint, Triangle, Area, 3/10. |
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Geometry Problem 1267.
Triangle, Incircle, Excircle, Circle, Tangency Points, Perpendicular, 90 Degrees, Parallelogram. |
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Geometry Problem 1256.
Parallelogram, Angle Bisector, Measurement. |
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Geometry Problem 1202
Four Squares, Two Equal Parallelograms, Congruence. |
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Geometry Problem 1196
Parallelogram, Midpoint, Metric Relations. |
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Geometry Problem 1188
Triangle, Parallelogram, Parallel Lines, Trapezoid, Area. |
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Geometry Problem 1183
Parallelogram, Diagonals, Circle, Tangent Line. |
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Geometry Problem
1047.
Parallelogram, Parallel Lines, Concurrent Lines, Diagonals. |
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Geometry Problem
1044.
Triangle, Parallelogram, Midpoint, Area. |
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Geometry Problem
1042.
Scalene Triangle, Isosceles, Equal Angles, Parallelogram, Congruence. |
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Geometry Problem 978.
Parallelogram, Diagonal, Transversal, Similarity, Metric Relations. |
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Geometry Problem 880
Triangle, Midpoints, Sides, Perpendiculars, Hexagon, Area. |
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Geometry Problem 865
Parallelogram, Diagonal, Midpoint, Side, Triangle, Parallel, Similarity. |
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Geometry Problem 864
Parallelogram, Diagonal, Congruence, Similarity, Metric Relations. |
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Geometry Problem 860
Triangle, Three Medians, Parallel, Parallelogram, Area, Congruence. |
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Geometry Problem 854
Triangle, Parallel lines, Parallelogram, Areas, Similarity, Concurrent lines. |
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Geometry Problem 840
Parallelogram, Perpendicular, Diagonal, Metric Relations, Similarity. |
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Geometry Problem 839
Problem 839: Parallelogram, Perpendicular, Diagonal, Metric Relations. |
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Geometry Problem 838
Parallelogram, Perpendicular, Diagonal, Metric Relations. |
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Geometry Problem 836
Parallelogram, Perpendicular, Diagonal, Similarity, Metric Relations. |
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Geometry Problem 834
Parallelogram, Diagonal, Similarity, Geometric Mean, Mean Proportional. |
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Geometry Problem 833
Parallelogram, Diagonal, Similarity, Proportion. |
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Geometry Problem 831
Quadrilateral, Diagonal, Midpoint, Opposite Angles, Congruence, Parallelogram. |
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Geometry Problem 808
Parallelogram, Perpendicular, Right Triangle, Semicircle Area, Diameter. |
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Geometry Problem 799
Parallelogram, Angle Bisector, Parallel, Triangle, Circumcircle, Circumcenter. |
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Geometry Problem 798
Parallelogram, Secant Line, Tangent Circles, Circumcircles, Triangle. |
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Geometry Problem 797
Parallelogram, Angle Bisector, Isosceles and Similar Triangles. |
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Geometry Problem 782
Triangle, Orthocenter, Circumcenter, Circumcircle, Diameter, Altitude, Parallelogram. |
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Geometry Problem 771
Area of a Parallelogram, Star, Pentagon, Triangles. |
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Geometry Problem 770
Parallelogram, Angle Bisector, Triangle, Circumcenter, Circumcircle, Angle Measurement. |
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Geometry Problem 768
Parallelogram with Equilateral Triangles on Sides. |
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