![](../landscape/landscape_px1.gif) |
|
![Go Geometry Education: Centroid](h_triangle_center_910.jpg)
Centroid or Barycenter of a triangle, Online Geometry, Theorems and Problems
|
Centroid of a triangle, Index
|
![Centroid of a triangle Index](centroid_barycenter_index.jpg) |
|
![Euclid's Elements 23 definitions](../geometry/euclid_elements_definition_170.jpg) |
Euclid's Elements Book I, 23 Definitions
One-page visual illustration.
Euclid's
Elements Book. Index |
![Dynamic Geometry: Centroid of a Triangle. HTML5 Animation for Tablets (iPad, Nexus..)](../geogebra/geogebra-triangle-centroid-median-html5-animation-ipad-nexus-1.jpg) |
GeoGebra, Dynamic Geometry:
Centroid
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
![Dynamic Geometry: Euler Line of a Triangle. HTML5 Animation for Tablets (iPad, Nexus..)](../geogebra/geogebra-triangle-euler-line-html5-animation-ipad-nexus-1.jpg) |
GeoGebra, Dynamic Geometry:
Euler Line
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
![](../triangle_center_170.jpg) |
Triangle Centers. |
![Distance between triangle centers](distance_triangle_centers.jpg) |
Distances between Triangle Centers
Index.
|
![Geometry Problem 1515](../school-college/6/p1515-distance-centroid-triangle-median-exterior-line-perpendicular-1.jpg) |
Geometry
Problem 1515 and a Thematic Poem.
Mastering Triangle Distance Calculation: Find the Distance from the Intersection of Medians to an Exterior Line. Difficulty Level: High School. |
![Problem 1438](../school-college/5/p1438-triangle-incenter-circuncenter-centroid-parallel-90-degree-ipad-apps-1.jpg) |
Geometry Problem 1438.
Triangle, Incenter, Centroid, Circumcenter, Parallel, 90 Degree, Art, Poster, Typography, iPad Apps. |
![Geometry problem 1263](../school-college/3/p1263-triangle-medians-90-degree-perpendicular-1.jpg) |
Geometry Problem 1263.
Triangle, Medians, Centroid, 90 Degrees, Perpendicular. |
![Geometry problem 1205](../school-college/3/p1205-napoleon-theorem-inner-outer-centroid-1.jpg) |
Geometry Problem 1205
Triangle, Centroid, Outer and Inner Napoleon Equilateral Triangles. |
![Geometry problem 1179](../school-college/2/p1179-triangle-centroid-transversal-ratio-sides-theorem-1.jpg) |
Geometry Problem 1179
Triangle, Centroid, Transversal, Sum of Ratios, Sides. |
![Geometry problem 1125](../school-college/2/p1125-triangle-four-equilateral-centroid-midpoint-1.jpg) |
Geometry Problem 1125.
Triangle, Four Equilateral Triangles, Centroid, Midpoint. |
![Geometry Problem 1007](../school-college/1/p1007-hexagon-midpoint-triangle-median-centroid-concurrent-math-1.jpg) |
Geometry Problem
1007.
Hexagon, Midpoint, Triangle, Median, Centroid, Concurrency. |
![van Lamoen Circle, Triangle, Medians, Centroid, Six Circumcenters, Concyclic Points](../school-college/p847-triangle-centroid-six-circumcenter-concyclic-points-lamoen-1.jpg) |
Geometry Problem 847
van Lamoen Circle, Triangle, Medians, Centroid, Six Circumcenters, Concyclic Points. |
![Triangle, Medians, Centroid, Four Circumcenters, Concyclic Points, Cyclic Quadrilateral, Similarity](../school-college/p846-triangle-centroid-four-circumcenter-concyclic-points-1.jpg) |
Geometry Problem 846
Triangle, Medians, Centroid, Four Circumcenters, Concyclic Points, Cyclic Quadrilateral, Similarity. |
![Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity](../school-college/p845-triangle-centroid-four-circumcenter-perpendicular-median-similarity-1.jpg) |
Geometry Problem 845
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity. |
![Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity](../school-college/p844-triangle-centroid-four-circumcenter-perpendicular-median-similarity-1.jpg) |
Geometry Problem 844
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity. |
![Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Parallel, Congruence, Similarity](../school-college/p843-triangle-centroid-four-circumcenter-perpendicular-parallel-similarity-1.jpg) |
Geometry Problem 843
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Parallel, Congruence, Similarity. |
![Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity](../school-college/p842-triangle-centroid-four-circumcenter-perpendicular-similarity-1.jpg) |
Geometry Problem 842
Triangle, Medians, Centroid, Four Circumcenters, Perpendicular, Congruence, Similarity. |
![Triangle, Medians, Centroid, Circumcenters, Perpendicular, Congruence, Similarity](../school-college/p841-triangle-centroid-circumcenter-perpendicular-similarity-1.jpg) |
Geometry Problem 841
Triangle, Medians, Centroid, Circumcenters, Perpendicular, Congruence, Similarity. |
![Triangle, Orthocenter, Centroid, Circumcenter, Circumradius, Midpoint](../problem/p742-circumradius-orthocenter-centroid-midpoint-distance-1.jpg) |
Geometry Problem
742.
Scalene Triangle, Orthocenter, Centroid, Circumcenter, Circumradius, Midpoint, Distance, Square, Metric Relations. |
![Centroid, Barycenter](../problem/p576_centroid_barycenter_1.jpg) |
Problem
576.
Centroid, Triangle, Quadrilateral, Parallel, Measurement. |
![Hexagon, Centroids](../problem/p402_hexagon_centroid_17.jpg) |
Proposed Problem 402.
Hexagon, Triangle, Centroid, Parallel, Congruence, Similarity. |
![Elearning 161 Parallelogram and Octagon Areas](../problem/p161_parallelogram_area_17.jpg) |
Proposed Problem 161.
Parallelogram, Midpoints, Octagon, Areas, Centroid.
|
![](nine_point_center_euler_170.jpg) |
Nine-Point Center, Nine-Point Circle, Euler Line (English
version).
Interactive illustration.
Centroid, Orthocenter, Circumcenter.
|
![](../puzzle/euler_line_nine_point_170.jpg) |
Puzzle: Euler Line and Nine Point Center
|
![](../geometry/schiffler_point_euler_17.jpg) |
Schiffler Point: Four Euler Lines with interactive animation and
manipulation.
|
![Problem 254: Triangle and Centroid](../problem/p255_triangle_centroid_17.jpg) |
Proposed Problem 255.
Triangle, Centroid, Vertices, a Point, Distances, Squares.
|
![Elearning 254: Triangle and Centroid](../problem/p254_triangle_centroid_17.jpg) |
Proposed Problem 254.
Triangle, Centroid, Vertices, a Point, Distances, Squares.
|
![Elearning 253: Triangle, Centroid](../problem/p253_triangle_centroid_17.jpg) |
Proposed Problem 253.
Triangle, Centroid, Vertices, Distances, Squares.
|
![Triangle sides, medians, squares](../problem/p249_triangle_medians_17.jpg) |
Proposed Problem 249.
Triangle sides, medians, squares.
|
![Elearning: Napoleon Theorem III](../problem/p248_napoleon_theorem_17.jpg) |
Proposed Problem 248.
Napoleon's Theorem III. Inner and outer Napoleon triangles, Area.
|
![Napoleon Theorem II](../problem/p247_napoleon_theorem_17.jpg) |
Proposed Problem 247.
Napoleon's Theorem II. Internal Equilateral triangles. Inner Napoleon
triangle.
|
![Napoleon Theorem I](../problem/p246_napoleon_theorem_17.jpg) |
Proposed Problem 246.
Napoleon's Theorem I. External Equilateral triangles. |
![Elearn 229: Triangle, Centroid, Transversal](../problem/p229_triangle_centroid_17.jpg) |
Proposed Problem 229. Triangle, Centroid, Transversal, Perpendicular
lines. |
![Elearn 227: Triangle, Centroid](../problem/p227_triangle_centroid_17.jpg) |
Proposed Problem 227. Triangle, Centroid, Exterior line,
Perpendicular lines. |
![Problem 226: Triangle, Centroid](../problem/p226_triangle_centroid_17.jpg) |
Proposed Problem 226. Triangle, Centroid, Perpendicular lines.
|
![Triangle Centers Video](../center/triangle_center_video_17.jpg) |
Journey
to the Center of a Triangle (1976). Incenter, Circumcenter,
Centroid, Orthocenter. |
![Eight Point Circle Theorem. Elearning](../geometry/eight_point_circle_17.jpg) |
Eight-Point Circle Theorem
centroid or gravity center of quadrilateral.
Step-by-Step construction, Manipulation, and animation. |
![Elearning Geometry](../geometry/triangle_median_circ_17.jpg) |
Triangle, Medians, Six Circumcenters Concyclic.
Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.
Prove proposition. |
![Elearn 127: Centroid, Incenter](../problem/p127_centroid_incenter_17.jpg) |
Proposed Problem 127. Centroid
and Incenter of a Triangle, Parallel, Proportions.
|
![](spieker_center_170.jpg) |
Spieker Center Medial
triangle, Centroid, Incircle |
![](../heron/heron_medians_170x100.jpg) |
Heron's Formula with medians |
![](lemoine_point_170.jpg) |
Symmedian (Lemoine) Point
Triangle Center |
![Classical Pythagorean Theorem](../pythagoras/pythagoras_theorem_17.jpg) |
Right Triangle: Centroid. Centers, Inradius, Circumradius, Incenter,
Circumcenter, Orthocenter, Centroid, Poncelet's theorem, Sagitta |
![Quadrilateral Area, Elearning.](../problem/p098_quadrilateral_area_17.jpg) |
Proposed Problem 98.
Quadrilateral Area, Centroid, Similarity. |
Home |
Search | Geometry
|
Centers
|
Post a comment | Email
Last updated: Feb 27, 2023
|
|
|
|
|
![](../landscape/landscape_bg_right.gif) |
![](../landscape/landscape_px1.gif) |