# The Properties of a Parallelogram

Definitions and formulas for the perimeter of a parallelogram, the area of a parallelogram, properties of the sides and angles of a parallelogram
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 perimeter of a parallelogram area of a parallelogram properties of the sidesand angles of a parallelogram other properties of theangles of a parallelogram

 The perimeter of a parallelogram: To find the perimeter of a parallelogram, just add up all the lengths of the sides:Perimeter = a + b + a + b        = 2a + 2b
 The area of a parallelogram: To find the area of a parallelogram, just multiply the base length (b) times the height (h):Area = b x h Yeah, that's the formula...  But let's check out where it comes from!
 Let's cut off a piece and move it... Now, it's a rectangle!Area = length x width = b x h

 The sides and angles of a parallelogram: Opposite sides of a parallelogram are the same length (congruent). Opposite angles of a parallelogram are the same size/measure (congruent.) Opposite sides of a parallelogram are parallel... Uh... You think that's where it got it's name?
 Other properties of the angles of a parallelogram: Adjacent sides (ones next to each other) of a parallelogram are supplementary.  This means that their measures add up to 180 degrees.