Amazing Facts About Triangles


If you have enjoyed the beauty of Mathematics in this blog, here are some addition for you to appreciate it more. Below are some of the most amazing facts about triangles.

The three altitudes of meet at a common point. This point is called the orthocenter of the triangle.

orthocenter of a triangles

The three lines from each vertex to the midpoint of the opposite side also meet at a common point called centroid of the triangle.


Centriod of Triangles

The lines that pass through the midpoint of each side and is perpendicular to the side (the perpendicular bisector) also meet at a common point called the circumcenter of the triangle.

Circumcenter of a Triangle

The orthocenter, the centroid, and the circumcenter of a triangle line on a straight line. This line is called the Euler line. The line was named after the great mathematician Leonhard Euler.

The Euler Line

The circumcenter is the center of the circle passing through the three vertices of the triangle. This circle is called the circumcircle.

The Circum Circle of a Triangle

These are only a few of the many amazing properties of triangles. Now the question is, is this true for all types of triangles? You might need a Geometry software to answer this question. You might want to try GeoGebra (it’s for free) and learn about it in my step by step tutorials.



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Guillermo Bautista

There are 5 comments. Add yours

  1. 8th September 2012 | Shecky R says: Reply
    For any who don't know (and are interested in triangles), Alfred Posamentier has a wonderful new book out, "The Secrets of Triangles".
  2. 8th September 2012 | John says: Reply
    Typo nitpick. "The orthocenter, the centroid, and the orthocenter..." I'm pretty sure the second "orthocenter" is a mistake. Other than that, nifty! Euler line...
  3. Pingback: Amazing Facts About Triangles Part 2 - Mathematical Palette September 9, 2012

    [...] Post ListCategoriesAboutContact Me Amazing Facts About Triangles Part 2 In the previous post, we have seen that the orthocenter, circumcenter, and centroid of a triangle lie on the same line. [...]

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