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![College Geometry Online, eLearning](../machu_picchu_h1_810.jpg)
Plane Geometry Puzzles: Solving Parallelogram Problems
and Theorems
![Geometry: Parallelogram, Theorems and Problems Parallelogram GoGeometry Collection](parallelogram_index_word_cloud_7.jpg)
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Parallel sides meet,
Area, angles, symmetry,
Parallelogram's feats.
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![Parallelograms Index](../geometry/parallelograms_17.jpg) |
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![Parallelogram Definition](../math_geometry_online_courses/parallelogram_definition_1.jpg) |
Parallelogram
Definition. |
![Art: Parallelogram and Delaunay](../computational_geometry/delaunay-triangulation/parallelogram-kids-art-delaunay-1.jpg) |
Geometric Art:
Parallelogram for Kids, Delaunay Triangulation. |
![Parallelogram and Machu Picchu](parallelogram-machu-picchu-1.jpg) |
Parallelogram on blurred background of Machu Picchu. |
![Squares Index](squares_index_17.jpg) |
Square.
Theorems and Problems Index. |
![Rectangle Index](rectangle_index_17.jpg) |
Rectangle.
Theorems and Problems Index. |
![Area Parallelogram Index](parallelogram_area_i_1.jpg) |
Area of a Parallelogram.
Theorems and Problems Index. |
![Geometry Problem 1537](../school-college/6/p1537-parallelogram-midpoint-triangle-area-intersection-math-challenge-1.jpg) |
Geometry Problem 1537 Challenge: Can You Solve for the Missing Area in a Parallelogram using Midpoints and Intersection Points?. |
![Geometry Problem 1526](../school-college/6/p1526-parallelogram-intersecting-bisectors-distance-congruence-1.jpg) |
Geometry
Problem 1526: Mastering Geometry Problem-Solving: Discover the Distance Between Two Sides in a Parallelogram Using Bisectors and Distance Measures.
. |
![Geometry Problem 1524](../school-college/6/p1524-parallelogram-angle-bisector-intersect-distance-1.jpg) |
Geometry
Problem 1524 and a Thematic Poem.
Unlock the Mystery of Parallelograms: Discover the Length of Segment between the Intersecting Angle Bisectors. |
![Geometry Problem 1519](../school-college/6/p1519-parallelogram-length-midpoints-parallel-line-1.jpg) |
Geometry
Problem 1519 and a Thematic Poem.
Discover the Length of a Segment in a Parallelogram using Midpoints and Parallel Lines. |
![Geometry Problem 1494](../school-college/5/p1494-parallelogram-midpoints-octagon-area-1.jpg) |
Geometry
Problem 1494.
Parallelogram, Midpoints, Octagon, Areas. |
![Geometry Problem 1493](../school-college/5/p1493-four-squares-vertex-parallelogram-auxliliary-line-1.jpg) |
Geometry
Problem 1493.
Four Squares, Parallelogram, Auxiliary Lines. |
![Dynamic Geometry 1470](../school-college/5/p1470-tangential-quadrilateral-circle-rhombus-geogebra-1.jpg) |
Dynamic Geometry 1470.
Tangential Quadrilateral, Incircles, Tangent,
Parallel, Rhombus, Step-by-step Illustration. |
![Geometry Problem 1463](../school-college/5/p1463-parallelogram-equal-sum-area-triangles-geogebra-1.jpg) |
Geometry Problem 1463.
Parallelogram, Interior Point, Opposite Triangles with Equal Sum of Areas.
Step-by-step Illustration using GeoGebra. |
![Problem 1435](../school-college/5/p1435-circle-diameter-tangent-parallelogram-1.jpg) |
Geometry Problem 1435.
Circle, Diameter, Inscribed Circles, Circular Sector, Parallelogram, Parallel Lines, Tangency Points,
Poster, Typography, iPad Apps. |
![Problem 1424](../school-college/5/p1424-parallelogram-triangle-trapezoid-area-1.jpg) |
Geometry Problem 1424. Triangle, Parallelogram, Trapezoid, Area, Diagonal, Measurement. |
![Problem 1381 Parallelogram, Triangle, Area](../school-college/4/p1381-parallelogram-triangle-area-1.jpg) |
Geometry Problem 1381. Parallelogram, Exterior Point, Triangle, Area. |
![Problem 1378 Parallelogram](../school-college/4/p1378-parallelogram-diagonal-perpendicular-distance-1.jpg) |
Geometry Problem 1378. Parallelogram, Diagonal perpendicular to a side, Distances from a Point to Vertices, Measurement. |
![Geometry problem 1339](../school-college/4/p1339-circle-diameter-tangent-secant-parallelogram-1.jpg) |
Problem 1339.
Circle, Diameter, Tangent, Secant, Parallelogram.
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![Geometry problem 1337](../school-college/4/p1337-parallelogram-circumcircle-tangent-congruence-tutoring-1.jpg) |
Problem 1337.
Parallelogram, Diagonals, Circle, Circumcircle, Tangent Line, Triangle, Congruence.
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![Geometry problem 1279](../school-college/3/p1279-parallelogram-area-midpoint-triangle-1.jpg) |
Geometry Problem 1279.
Parallelogram, Midpoint, Triangle, Area, 3/10. |
![Geometry problem 1267](../school-college/3/p1267-triangle-incircle-excircle-90-degree-parallelogram-1.jpg) |
Geometry Problem 1267.
Triangle, Incircle, Excircle, Circle, Tangency Points, Perpendicular, 90 Degrees, Parallelogram. |
![Geometry problem 1256](../school-college/3/p1256-parallelogram-angle-bisector-triangle-1.jpg) |
Geometry Problem 1256.
Parallelogram, Angle Bisector, Measurement. |
![Geometry problem 1202](../school-college/3/p1202-four-squares-two-equal-parallelograms-online-tutor-1.jpg) |
Geometry Problem 1202
Four Squares, Two Equal Parallelograms, Congruence. |
![Geometry problem 1196](../school-college/2/p1196-parallelogram-midpoint-metric-relation-1.jpg) |
Geometry Problem 1196
Parallelogram, Midpoint, Metric Relations. |
![Geometry problem 1188](../school-college/2/p1188-triangle-parallelogram-area-trapezoid-congruence-parallel-1.jpg) |
Geometry Problem 1188
Triangle, Parallelogram, Parallel Lines, Trapezoid, Area. |
![Geometry problem 1183](../school-college/2/p1183-parallelogram-circle-diagonal-tangent-1.jpg) |
Geometry Problem 1183
Parallelogram, Diagonals, Circle, Tangent Line. |
![Geometry Problem 1047](../school-college/1/p1047-parallelogram-parallel-diagonal-concurrency-math-1.jpg) |
Geometry Problem
1047.
Parallelogram, Parallel Lines, Concurrent Lines, Diagonals. |
![Geometry Problem 1044](../school-college/1/p1044-quadrilateral-parallelogram-area-math-1.jpg) |
Geometry Problem
1044.
Triangle, Parallelogram, Midpoint, Area. |
![Geometry Problem 1042](../school-college/1/p1042-triangle-isosceles-angle-congruence-parallelogram-math-1.jpg) |
Geometry Problem
1042.
Scalene Triangle, Isosceles, Equal Angles, Parallelogram, Congruence. |
![Geometry Problem 978](../school-college/p978-parallelogram-diagonal-transversal-similarity-metric-relations-1.jpg) |
Geometry Problem 978.
Parallelogram, Diagonal, Transversal, Similarity, Metric Relations. |
![Geometry Problem 880](../school-college/p880-triangle-midpoint-perpendicular-hexagon-area-parallelogram-1.jpg) |
Geometry Problem 880
Triangle, Midpoints, Sides, Perpendiculars, Hexagon, Area. |
![Geometry problem 865, Parallelogram, Midpoint, Parallel](../school-college/p865-parallelogram-similarity-midpoint-parallel-1.jpg) |
Geometry Problem 865
Parallelogram, Diagonal, Midpoint, Side, Triangle, Parallel, Similarity. |
![Geometry problem 854 about Parallelogram](../school-college/p864-parallelogram-congruence-similarity-metric-relations-1.jpg) |
Geometry Problem 864
Parallelogram, Diagonal, Congruence, Similarity, Metric Relations. |
![Triangle, Three Medians, Parallel, Parallelogram, Area, Congruence](../school-college/p860-triangle-three-medians-area-1.jpg) |
Geometry Problem 860
Triangle, Three Medians, Parallel, Parallelogram, Area, Congruence. |
![Problem 854: Triangle, Parallel lines, Parallelogram, Areas, Similarity, Concurrent lines](../school-college/p854-triangle-parallelogram-parallel-area-similarity-1.jpg) |
Geometry Problem 854
Triangle, Parallel lines, Parallelogram, Areas, Similarity, Concurrent lines. |
![Parallelogram, Perpendicular, Diagonal, Metric Relations, Similarity](../school-college/p840-parallelogram-perpenddicular-sides-diagonal-1.jpg) |
Geometry Problem 840
Parallelogram, Perpendicular, Diagonal, Metric Relations, Similarity. |
![Problem 839: Parallelogram, Perpendicular, Diagonal, Metric Relations](../school-college/p839-parallelogram-perpendicular-sides-projection-1.jpg) |
Geometry Problem 839
Problem 839: Parallelogram, Perpendicular, Diagonal, Metric Relations. |
![Parallelogram, Perpendicular, Diagonal, Metric Relations](../school-college/p838-parallelogram-perpendicular-diagonal-metric-relations-1.jpg) |
Geometry Problem 838
Parallelogram, Perpendicular, Diagonal, Metric Relations. |
![Parallelogram, Perpendicular, Diagonal, Similarity, Metric Relations](../school-college/p836-parallelogram-perpendicular-diagonal-similarity-1.jpg) |
Geometry Problem 836
Parallelogram, Perpendicular, Diagonal, Similarity, Metric Relations. |
![Parallelogram, Diagonal, Similarity, Geometric Mean, Mean Proportional](../school-college/p834-parallelogram-diagonal-geometric-mean-proportional-1.jpg) |
Geometry Problem 834
Parallelogram, Diagonal, Similarity, Geometric Mean, Mean Proportional. |
![Parallelogram, Diagonal, Similarity, Proportion](../school-college/p833-parallelogram-diagonal-proportion-similarity-1.jpg) |
Geometry Problem 833
Parallelogram, Diagonal, Similarity, Proportion. |
![Quadrilateral, Triangle, Angles, 30 degrees, Congruence](../school-college/p831-quadrilateral-diagonal-midpoint-parallelogram-1.jpg) |
Geometry Problem 831
Quadrilateral, Diagonal, Midpoint, Opposite Angles, Congruence, Parallelogram. |
![Parallelogram, Perpendicular, Semicircle, Area](../school-college/p808-parallelogram-perpendicular-right-triangle-semicircle-area-1.jpg) |
Geometry Problem 808
Parallelogram, Perpendicular, Right Triangle, Semicircle Area, Diameter. |
![Parallelogram, Angle Bisector, Parallel, Triangle, Circumcircle, Circumcenter](../school-college/p799-parallelogram-angle-bisector-circumcircle-circumcenter-1.jpg) |
Geometry Problem 799
Parallelogram, Angle Bisector, Parallel, Triangle, Circumcircle, Circumcenter. |
![Parallelogram, Secant Line, Tangent Circles, Triangle](../school-college/p798-parallelogram-secant-line-tangent-circles-1.jpg) |
Geometry Problem 798
Parallelogram, Secant Line, Tangent Circles, Circumcircles, Triangle. |
![Parallelogram, Angle Bisector](../school-college/p797-parallelogram-angle-bisector-isosceles-1.jpg) |
Geometry Problem 797
Parallelogram, Angle Bisector, Isosceles and Similar Triangles. |
![Triangle, Orthocenter, Circumcircle, Diameter, Altitude, Parallelogram](../school-college/p782-triangle-orthocenter-circumcircle-diameter-parallelogram-1.jpg) |
Geometry Problem 782
Triangle, Orthocenter, Circumcenter, Circumcircle, Diameter, Altitude, Parallelogram. |
![Parallelogram, Star, Pentagon, Area](../problem/p771-parallelogram-star-pentagon-triangle-area-1.jpg) |
Geometry Problem 771
Area of a Parallelogram, Star, Pentagon, Triangles. |
![Triangle, Circumcircle, Circumcenter, Orthocenter, Midpoint arc, Parallel chord, Congruence](../problem/p770-parallelogram-triangle-circumcenter-angle-bisector-1.jpg) |
Geometry Problem 770
Parallelogram, Angle Bisector, Triangle, Circumcenter, Circumcircle, Angle Measurement. |
![Parallelogram with wquilateral triangles](../problem/p768-parallelograms-equilateral-triangles-1.jpg) |
Geometry Problem 768
Parallelogram with Equilateral Triangles on Sides. |
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