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4-62.

Find the area and perimeter of each shape. Show your work.  

  1. An enclosed figure with lengths in centimeters: Starting at the upper left corner: right 12, down 2, left 3, down 5, right 3, down an unknown amount, left 9, up 7, left an unknown amount, up 2, to enclose the figure.

    Divide this shape into smaller rectangles and find the areas of these.

    sq cm

    To find the perimeter, add the lengths of all the sides.

  1. A shaded circle where the top right quarter is missing. The radius of the circle is labeled as 4 inches.

    Find the area of a circle . Notice that this is only three-fourths of a circle.

    Find the circumference of a circle (). Note that this is, again, three-fourths of a circle.
    Once you find the adjusted circumference, remember to incorporate the radius of the straight edges in your calculations.