The length of the rectangle is 18 cm and the width is 60% of its length. Calculate the perimeter and area of the rectangle.

| February 13, 2021 | education

To begin with, we will formulate and write down the formulas for finding the perimeter and area of ​​a rectangle.

1.The area of ​​a rectangle is equal to the product of the lengths of its two adjacent sides (a, b):

S = a * b;

2. The perimeter of a rectangle is equal to the doubled sum of its 2 adjacent sides:

P = 2 * (a + b);

Based on the formulas we have formulated, we need to know the length of the sides. According to the terms of the assignment, we have that one side has a length of 18 centimeters, and the length of the second is 60% of the side of 18 centimeters. Find the second side and then calculate the area and perimeter of the rectangle.

18 * 0.6 = 10.8 centimeters, the length of the second side.

S = 18 * 10.8 = 194.4 cm2 (square centimeters);

P = 2 * (18 + 10.8) = 2 * 28.2 = 57.6 cm.



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