Definition of isosceles triangle and examples.

An isosceles triangle is a triangle that has two congruent sides, or two sides of equal length.

In fact,  the word isosceles came from the Greek word " iso" meaning "equal" and the Greek word "skelos" meaning leg. 

Isosceles triangle

The sides that are equal are shown with the green lines and the base is shown with the blue line.

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.
Share this page: