1. Bellwork Find the area of the shapes described: Find the area of the shapes described: 1.Rectangle with sides 4 inches by 7 inches. 2.Square with side 8 yards. 3.Rectangle with sides 2 meters by 11 meters. 4.Square with side 6 feet. 5.Rectangle with sides 2 feet by 6 inches. Answers: 1.28 inches 2 2.64 yards 2 3.22 meters 2 4.36 feet 2 5.144 inches 2 or 1 foot 2 1

2. Geometry AREA: RECTANGLES, SQUARES, PARALLELOGRAMS AND TRIANGLES

3. Area Area is defined as the extent or measurement of a surface. Area is defined as the extent or measurement of a surface. This means that it is given by two dimensions (usually length and width) This means that it is given by two dimensions (usually length and width) This requires then that the result be given a two dimensional notation, thus we add the superscript 2 to the units used. This denotes the units of measure (feet, inches, meters, etc) and tells the person looking at the information that it is in two dimensional space (thus the reason for the 2). This requires then that the result be given a two dimensional notation, thus we add the superscript 2 to the units used. This denotes the units of measure (feet, inches, meters, etc) and tells the person looking at the information that it is in two dimensional space (thus the reason for the 2). 3

4. The Area of a Rectangle 4

5. Area of a Square 5

6. Area of a Parallelogram 6

7. Why does that work?? 7

8. So what about the area of a triangle?? 8

9. Example 1: Find the area 9

10. Example 2: Find the missing information 10

11. Example 3: Find the area 11

12. Example 4: Find the area 12

13. Example 5: Find the missing information 13

14. Homework ASSIGNMENT 9-1