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4. Example 1-1a Objective Find the area of parallelograms

5. Example 1-1a Vocabulary parallelogram A quadrilateral with opposite sides parallel Height Base

6. Example 1-1a Vocabulary base Either side that is perpendicular to the height Height Base

7. Example 1-1a Vocabulary height The distance between the 2 bases Height Base

8. Lesson 1 Contents Example 1Find Areas of Parallelograms Example 2Find Areas of Parallelograms Example 3Use Area to Solve a Problem

9. Example 1-1a Find the area of the parallelogram. Count number of units of the length of a base 1 2 3 Replace b with 3 units A = 3 units Base Write formula for area of parallelogram 1/3

10. Example 1-1a Find the area of the parallelogram. Count number of units between the 2 bases 1 2 3 4 5 6 7 8 9 10 Replace h with 10 units A = 3 units Base  10 units 1/3

11. Example 1-1a Find the area of the parallelogram. Multiply the numbers 3  10 A = 3 units  10 units A = 30 Multiply the units unit  unit unit 2 Answer: 1/3

12. Example 1-1b Find the area of the parallelogram. Answer: A = 20 units 2 1/3

13. Example 1-2a Find the area of the parallelogram. 2/3 Replace b with 8.2 cm A = 8.2 cm Replace h with 4.5 cm  4.5 cm Write formula for area of parallelogram

14. Example 1-2a Find the area of the parallelogram. 2/3 A = 8.2 cm  4.5 cm Multiply the numbers 8.2  4.5 A = 36.90 Multiply the units cm  cm cm 2 Answer:

15. Example 1-2b Find the area of the parallelogram. Answer: 17.64 in 2 2/3

16. Example 1-3a INTERIOR DESIGN A particular area rug is shaped like a parallelogram. What is the area of the floor it will cover? 3/3 Write formula for area of parallelogram Replace b with ft A = ft Replace h with ft  ft

17. Example 1-3a INTERIOR DESIGN A particular area rug is shaped like a parallelogram. What is the area of the floor it will cover? 3/3 A = ft  ft Multiply the numbers  Multiply the units ft  ft A = Since the dimensions are fractions the answer must be fractions ft 2 Answer:

18. Example 1-3b PAINTING John needs to paint a mural that is parallelogram-shaped. What is the area of the mural John needs to paint? Answer: 3/3

19. End of Lesson 1 Assignment Lesson 14:1Area of Parallelograms3 - 13 All