![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The given lengths of the sides are 9, 21, and 20.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=357962b42ae3fc9ff31ffbf5f8cb2615.png\")
The sum of the lengths of any two sides of a triangle is should be greater than the length of the third side.
\So, 9, 21, and 20 are the measures of a triangle.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The given measures can be the lengths of the sides of a triangle.