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12-40.

Multiple Choice: Which shape below has the least area?  

  1. A circle with radius units.

  2. A square with side length units.

  3. A trapezoid with bases of length and units and height of units.

  4. A rhombus with side length units and height of units.

Recall the formulas for each of these shapes. If you are having trouble visualizing, you may want to draw a diagram.

(d)