Hi I am 19 yrs old... 5'6 height and I weigh 180 pounds!. Am I considered over weight!. I don't know which shape I am,. considering that my bellies are round in shape... but they don't hung loose.. or protrude... my hips are much much much biger in size... n protrude... does that make me a pear shaped individuAL?. also am I overweight with the above said dimensions..

Sounds like you are your right weight.
I would say between 160 to 180 is a good range.

Pear shape would be if your chest is noticeably smaller than your hips

There's no substitute for adequate physical exercise. Here's an interesting article with charts: Standard Weight Charts, Weight Chart for Men, Weight Chart for Women