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You set up a makeshift greenhouse by leaning a square pane of glass against a building. The glass is 4.5 ft long and it makes a 30 degree angle with the ground. How much horizontal distance between the building and the glass is there to grow plants? Round to the nearest inch.

  • Geometry - ,

    make a sketch, label the base distance as x
    then cos 30° = x/4.5
    x = 4.5cos30° = 3.897 inches or 4 inches to the nearest inch

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