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Chapter 9   

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Sun Space
solution

Charlie should order 22 boxes of floor tiles.

explanation

Step 1
Draw a diagram of the space.
triangle and rectangle

Step 2
Find the area of the space. Separate the space into a triangle and a rectangle.

  • Find the area of ABCE.
    Use the formula A = lw.
    A = 20 ft x 8 ft
    Area of rectangle ABCE = 160 ft2
  • Find the area of the triangle AED.
    se the formula A = 1/2 bh.
    A = 1/2 20 x 8
    Area of triangle AED = 80 ft2
  • Add the areas of ABCE and AED.
    160 ft2 + 80 ft2= 240 ft2
Step 3
Find how many tiles are needed.
  • 1 tile = 1 square foot This means that for each square foot of floor space, Charlie needs 1 tile. For 240 ft2 of floor space, Charlie will need 240 tiles.
  • Add 2 dozen extra tiles for replacements. 240 tiles + 24 tiles = 264 tiles
  • The tiles come in boxes of a dozen.
  • Divide. 264 tiles ÷ 12 = 22 boxes of tiles

 


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