A picture of a pentagon looks like a house--that is a five sided figure with four vertices. Other objects that you may be familiar with that are pentagons are: a baseball home plate, the Pentagon building in DC, or a soccer ball patch.
A pentagon shape looks like a house with the slanted roof and square bottom. It is a closed, plane, 5-sided figure with all straight sides. A regular pentagon has all 5 sides the same length. These are all pentagons.
Takes a while of practice if you have like a math book with a pentagon then just copy it through the paper or look at an image until you get it right. for example i couldn't draw a star when i was in 6th grade.