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A parallelogram is a "sat-on" rectangle; opposite sides are equal in length → perimeter = 7 + 11 + 7 + 11 inches = 36 inches.
The perimeter of a triangle is the sum of the lengths of its sides. In this case, the perimeter of the triangle with sides measuring 3 inches, 5 inches, and 7 inches is 3 + 5 + 7 = 15 inches.
Perimeter = 2*(5 + 7) = 24 inches.Area = 5 * 7 = 35 square inches.
-- Perimeter = distance all the way around it = (5 + 7 + 5 + 7) inches -- Area = (5 x 7) square inches
The perimeter is the distance around, the sum of the sides. A 5 x 7 or a 4 x 8 rectangle has a perimeter of 24.