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Transparency 8

Transparency 8. Click the mouse button or press the Space Bar to display the answers. Splash Screen. Example 8-3c. Objective. Find the perimeters and areas of figures. Example 8-3c. Vocabulary. Perimeter. The distance around a geometric figure. Example 8-3c. Vocabulary. Formula.

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Transparency 8

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  1. Transparency 8 Click the mouse button or press the Space Bar to display the answers.

  2. Splash Screen

  3. Example 8-3c Objective Find the perimeters and areas of figures

  4. Example 8-3c Vocabulary Perimeter The distance around a geometric figure

  5. Example 8-3c Vocabulary Formula An equation that shows a relationship among quantities Perimeter of Rectangle = 2L + 2W Area of Square = S2 Area of Rectangle = L  W

  6. Example 8-3c Vocabulary Area The measure of the surface enclosed by a figure

  7. Lesson 8 Contents Example 1Find the Perimeter of a Rectangle Example 2Find the Perimeter of an Irregular Figure Example 3Find the Area of a Rectangle

  8. Example 8-1a Find the perimeter of the figure. Write formula for perimeter of rectangle Replace L with 18 Replace W with 2 Follow order of operations Answer: P E MD AS feet Do both multiplication first Add Add dimensional analysis 1/3

  9. Example 8-1b Find the perimeter of the figure. Answer:p = 46 in. 1/3

  10. Example 8-2a Find the perimeter of the figure. Remember: Perimeter is adding all the sides together Write problem using addition Start at one point and work around the figure Answer: P = inches Add Add dimensional analysis 2/3

  11. Example 8-2c Find the perimeter of the figure. Answer: P = 10 ft 2/3

  12. Example 8-3a Find the area of the surface of the reservoir shown below. Write formula for area of a rectangle Answer: Replace L with 4 A = miles2 Replace W with Multiply Add dimensional analysis 3/3

  13. PAINTINGSue is painting a wall that measures feet long and 8 feet high. Find the area of the surface Sue will be painting. Example 8-3c * Answer: A = 146 ft2 3/3

  14. End of Lesson 8 Assignment

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