Finding each measure...Dealing with polygons

Ok..it says find each measure:
an interior angle in a regular hexagon, an exterior angle in a reg. decagon..What do I do...my teacher didnt explain this!! HEELLLPP!! :O

Review the definitions of "interior angle", "exterior angle", "hexagon", and "decagon". Make appropriate drawings, consult your text for formulas (you may only need to plug into something to get the answer), and please reply with everything you've been able to find and to attempt. Thank you.

Eliz.