Perimeter Circumference and Area Finding Perimeter and Circumference

Perimeter, Circumference, and Area

Finding Perimeter and Circumference The perimeter P of a polygon is the sum of the lengths of its sides. The area A of a polygon is the number of square units it encloses.

Finding Perimeter and Circumference For special figures and such as squares, rectangles, and circles, use formulas for perimeter and area.

Finding Perimeter and Circumference P = 4 s A = s 2

Finding Perimeter and Circumference P = 2 b + 2 h A = bh

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Finding Perimeter and Circumference A = bh

Finding Perimeter and Circumference A = ½ bh

Finding Perimeter and Circumference C = πd = 2πr A = πr 2

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Finding Perimeter and Circumference The units of measurement for perimeter and circumference include inches, feet, yards, miles, centimeters, meters and kilometers. When measuring area, use square units such as square inches, square meters, square centimeters, and square miles.

Finding Area Postulate 1 -9 If two figures are congruent, then their areas are congruent. Postulate 1 -10 The area of a region is the sum of the areas of its nonoverlapping parts.

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