Perimeter of a Polygon: add up all the sides and lengths.
Distance formula: The square root of (x2-x1)squared+(y2-y1)squared.
Thm 5-1 Area of a rectangle
A= Base times Height of A=Length times Width.
Postulate 5-1 Area of a Square
A=Side Squared
Postulate 5-2; If 2 figures are congruent, then their areas are the same.
Postulate 5-3: Area of a regionis the sum of its areas non-overlapping parts.
Find the Area of the square if all sides are congruent, and they all = 4.5 meters.