Showing posts with label Similarity of Triangles. Show all posts
Showing posts with label Similarity of Triangles. Show all posts

Wednesday, June 2, 2010

Similarity of Triangles

Let us learn what is meant by Similarity of Triangles,
You may say that triangle is also a polygon. So, we can state the same conditions for the similarity of two triangles. That is:
Two triangles are similiar, if
(i) their corresponding angles are equal and
(ii) their corresponding sides are in the same ratio (or proportion).

Note that if corresponding angles of two triangles are equal, then they are known as equiangular triangles. A famous Greek mathematician Thales gave an important truth relating to two equiangular triangles which is as follows:
The ratio of any two corresponding sides in two equiangular triangles is always the same.
It is believed that he had used a result called the Basic Proportionality Theorem (now known as
the Thales Theorem) for the same.
Hope this explains about Similarity of Triangles.