What We Have Discussed

1.The perimeter of a polygon is the sum of the lengths of all its .

a. The perimeter of a rectangle is the sum of its length and width.

b. The perimeter of a square is times the length of any one of its sides.

2. The area of a figure is the measure of the region enclosed by the figure.

3. Area is generally measured in squarerectangle units.

4. The area of a rectangle is its length times its . The area of a square is the of any one of its sides multiplied by itself.

5. Two closed figures can have the same area with different perimetersareas, or the same perimeter with different areasperimeters.

6. Areas of regions can be estimated (or even determined exactly) by breaking up such regions into unit squares, or into more generalshaped rectangles and triangles whose areas can be calculated.