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Surface Area

Surface Area. The sum of the areas of each face on a 3-D figure. To find surface area, add the area of each face together Front-2 X 5 = 10 Back-2 X 5 = 10 Top-2 X 3 = 6 Bottom-2 X 3 = 6 Left-3 X 5 = 15 Right- 3 X 15 = 15 Sum= 62 square units. 5. 3. 2.

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Surface Area

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  1. Surface Area The sum of the areas of each face on a 3-D figure To find surface area, add the area of each face together Front-2 X 5 = 10 Back-2 X 5 = 10 Top-2 X 3 = 6 Bottom-2 X 3 = 6 Left-3 X 5 = 15 Right- 3 X 15 = 15 Sum= 62 square units 5 3 2

  2. The square units of measure inside an object Area • Use the formula to find area! • Triangle=base X height ÷ 2 • Rectangle= length X width • Parallelogram = base X height • Trapezoid = (base1 + base 2) ÷2 X height • Circle = π X radius2

  3. Volume The amount of space an object occupies measured in cubic units Volume=base area X height V= 6 X 3 X 4 V= 72 cubic units 4 3 6

  4. Perimeter The distance around an object or polygon To find perimeter add all the sides together P=10 + 12 + 12 P=34 units 12 12 10

  5. Directions • Get a piece of notebook paper, write your name on top. • On your notebook paper, number 1 to 15 • Determine if each situation is perimeter (P). Area (A), Surface Area (SA) or Volume (V) • Write the abbreviation beside each number.

  6. 2. Label on a can of food

  7. 3. how much paper to cover the bulletin board

  8. 4. how much rice will fill a bowl

  9. 5. how much paint is needed to paint the walls of room

  10. 6. how many tiles to cover the bathroom floor

  11. 7. fencing around a garden

  12. 8. the amount of toys that will fit in a toy box

  13. 9. how much cardboard to make a box

  14. 10. how much fabric to make a pillow

  15. 11. how much wood to make a picture frame

  16. 12. how much stuffing to fill a pillow

  17. Answers • SA • SA • A • V • SA • A • P • V • SA • SA 11. P 12. V

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