The equation is where d is the total number of degrees and c is number of the sides of the convex polygon.
The pentagon has 5 sides.
Substitute the value of in the original equation.
.
The total number of degrees in the pentagon is 540.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0ea56d7ad293cbddb506d2c6d2338702.png\")
where d is the total number of degrees and c is number of the sides of the convex polygon.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8f5d39faa2639d318e2a88deb174c39c.png\")
in the original equation.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6fa03a680c0175647b178c7ef66030bc.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=62968e6cad255c460d2a437d696096bf.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5327f272127035171513e981259c2893.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")