# Geometry - 4th Edition

## Chapter 7: Right Triangles

Some links are repeated for use with more than one lesson.

### This site applies to the entire chapter.

http://www.freemathhelp.com/Lessons/PreAlgebra_Right_Triangles_BB.htm This site contains a video tutorial with notes on right triangles.

### 7.1  Squares and Square Roots

http://www.mathsisfun.com/square-root.html

### 7.2  The Pythagorean Theorem

http://www.mathsisfun.com/pythagoras.html
This site explains the Pythagorean Theorem, explains examples, and contains animations to show triangle sides relating to each other.

http://www.mathwizz.com/geometry/help/help1.htm
This page contains the definition of the Pythagorean Theorem and an example.

### 7.3  Special Right Triangles

http://www.onlinemathlearning.com/special-right-triangles.html
This site explains the special right triangles and gives examples.

http://www.regentsprep.org/regents/math/algtrig/ATT2/indexATT2.htm
NEW This page explains and provides practice problems for the 30-60-90 and 45-45-90 special right triangles.