The two rectangles have the same perimeter. The width of the first is 12 cm.
| March 7, 2021 | education
The two rectangles have the same perimeter. The width of the first is 12 cm. The length is 2 times less find the length of the second rectangle if its width is 7 cm.
The width of the first rectangle is 12 cm.
The length of the rectangle is 2 times less.
The width of the second rectangle is 7 cm.
Determine the length of the second rectangle.
Let’s define the perimeter of the rectangle. To do this, you first need to determine the length of the first rectangle.
12: 2 = 6 cm.
Next, we define the first rectangle.
P = 2 * (a + b).
P = 2 * (12 + 6) = 2 * 18 = 36 cm.
Next, we determine the length of the second rectangle.
36 = 2 * (a + 7).
36/2 = a + 7.
18 = a + 7.
a = 18 – 7 = 11.
Answer: therefore, the length of the second rectangle is 11 cm.
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