Answer: When a transversal cuts (or intersects) parallel lines several pairs of congruent and supplementary angles are formed. There are 3 types of angles that are congruent: Alternate Interior, Alternate Exterior and Corresponding Angles. Some people find it helpful to use the 'Z test ' for alternate interior angles. If you can draw a Z or a 'backwards z', then the alternate interior angles are the ones that are in the corners of the Z.
Recover A Deleted Worksheet Sheet Tab in Excel. You probably have discovered that when you (accidentally) delete a sheet there is no Undo option to bring it back. One solution is to close your workbook without saving the changes and then reopen it in its original state.
Excel provides us with such good features as AutoSave and AutoRecover. If they are enabled, it won't be a problem for you to recover unsaved files and restore previous versions in Excel 2010 - 2013.f you want to know how to retrieve an overwritten Excel file, go ahead and read this article. 1  Excel AutoSave and AutoRecover. 2  How to recover unsaved files in Excel. 3  Recover overwritten Excel files. 4  How to save a backup copy of your workbook.