PowerPoint gives users the ability to rotate and flip objects. Using the Rotate features allows users to rotate an object such as a text box, image, wordart, etc in 90 degree increments or the free form tool can be used to rotate by any increment.
This will open a drop down menu. Go to the rotate option located below the Position objections category. It is in this area that the object can be rotated along with being flipped.
The other method for rotating a object to click on the object followed by clicking and holding on the green circle located at the top of the object and rotating .
If your looking for precision, In the arrange drop down menu go to the More Rotate Options.
This will open a new window that will allow the user to precisely put in the degree of rotation for the object.