The sides of the rectangle are 3: 2. The length of the longer side is 12cm. Find the perimeter of the rectangle
February 7, 2021 | education
| Let’s denote one part by “x”. Let’s calculate what it is equal to knowing that 3x is equal to 12 centimeters.
3x = 12;
x = 12/3;
x = 4.
Let’s calculate what the width of the rectangle is.
4 * 2 = 8 cm.
The perimeter of a rectangle is twice the sum of its length and width. Let’s calculate what the perimeter of a rectangle with a length of 12 cm and a width of 8 cm is equal to.
P = 2 * (12 + 8) = 2 * 20 = 40 cm.
Answer: 40 cm.
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