The width of the rectangle is 14 cm, and the length is 7 cm longer. Find the perimeter of the rectangle.
| July 2, 2021 | education
Let’s find the length of the triangle:
14 + 7 = 21 (cm).
The perimeter is the sum of the lengths of all sides. Therefore, the perimeter of the rectangle is: 2a + 2b, where a is its length, b is its width. Find the perimeter:
2 * 21 + 2 * 14 = 42 + 28 = 70 (cm).
Now let’s translate the perimeter into decimeters. To do this, divide it by 10 (since 1 dm = 10 cm):
70/10 = 7 (dm).
Answer: 7 dm.
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