1. Chapter 8
Polygons and Area

2. Section 3 Area of Squares and Rectangles

3. Regular
Equilateral
Equiangular

4. Total degrees - sum of known = missing
n = # of sides
n-2 = multiplier
180 * (n-2) = sum of
interior angles
Sum of angles known
Total degrees - sum of known = missing

5. How did you get your answer? How many blue rectangle?
yellow
squares will it take
to cover the
blue rectangle? }
How did you get your
answer?

7.  Area. The area of a flat, or plane figure is the number of unit squares that can be contained within it. The unit square is usually some standard unit, like a square meter, a square foot, or a square inch.

9. Example 3: Find the Height of a Rectangle The rectangle has an area of 54 square inches. Find its height.

10. Example 2: Find the Area of a Rectangle Find the area of the rectangular pool.

11. Example 1: Find the Area of a Square Find the area of the square.

12. Area is measure in square units such as square inches (in
Area is measure in square units such as square inches (in.2) and square meters (m2).

13. Checkpoint: Area of Squares and Rectangles Find the area of the quadrilateral. 4) A rectangle has an area of 52 square meters and a height of 4 meters. Find the length of its base.

14. To find the area of a complex polygon, divide the polygon into smaller regions whose areas you can find.

15. Example 4: Divide a Complex Polygon into Rectangles Find the dimensions of rectangles A and B.
A: base =
height =

16. Example 5: Find the Area of a Complex Polygon Find the area of the polygon made up of rectangles.
Shape
Base
Height
Area F G H
Whole

17. Checkpoint: Polygons Made Up of Rectangles Find the area of the polygon made up of rectangles.
shape
Base (b)
Height(h)
Area
A= b * h
units E 4 3
4 * 3 =12 m2 F 12
6-3=3
12 * 3 = 36 G
6-5 =1
3*1 =3
Ttal
= 51
shape
Base (b)
Height(h)
Area
A= b * h
units C 7 3 21
in2 D
7-4= 3
6-3= 3 9
Total
21+9 =30