SHAPES AND FIGURES OF PLANE GEOMETRYGeometryExample:Calculate the area and perimeter of a rectangle with w = 5´ and l = 6´. Be sure to includeunits in your answer.Solution:A = lw P= 2l+ 2wA = (5)(6) P= 2(5) + 2(6)A = 30 square feetP= 10 + 12P= 22 feetA square is a rectangle having four equal sides, as shown inFigure 12 SquareFigure 12.The area of a square is calculated using the following formula:A = a2(3-7)The perimeter of a square is calculated using the followingformula:A = 4a(3-8)The area of a square is always expressed in square units, and the perimeter of a square is alwaysexpressed in the original units.Example:Calculate the area and perimeter of a square witha = 5´. Be sure to include units in youranswer.Solution:A = a2P= 4aA = (5)(5) P= 4(5)A = 25 square feetP= 20 feet MA-03 Page 10Rev. 0
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