![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs.
\Apply Pythagorean formula, ![\"c](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=59255801c8952cfa96d123cf0fc2cca8.png\")
.
The length of the hypotenuse (c) = 5 and length of one side (a) = 3
\Substitute the values in above formula.
\![\"5](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=bae4cd9e43682657a2c285a03544e541.png\")
![\"25](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=d73b21f277e9b93cc81f337c432426c9.png\")
(Simplify)
![\"b](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=c3b55ae62a54d955fe3d03f96bdc3e44.png\")
![\"b](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=ce42e4f2ba435f2c0039c4321a84a795.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The length of the third side is 4.