11.1 Flashcards
Perimeter
sum of the lengths of the sides of a polygon Rect. --> p=2W+2L=2(W+L) Sq. --> p=4*side
Linear Measurement
perimeter is a linear measurement. The units for perimeters are cm, m, inch, ft, mi, and so on. Perimeters are never measured in square units such as square feet.
*** a one-dimensional measurement (length, distance) ex. 3cm^1
Area
the number of square units contained in the interior of a polygon (measured in square units such as square meters or square feet)
*** three formulas
Postulate 22: Area of a Square Postulate
the area of a square is the square of the length of its side, or A = s^2
Postulate 23: Area Congruence Postulate
if two polygons are congruent, then they have the same area
Postulate 24: Area Addition Postulate
the area of a region is the sum of the areas of all its nonoverlapping parts
Theorem 11.1: Area of a Rectangle Theorem
the area of a rectangle is the product of its base and height, or A = bh