Find the perimeter if you know that one side of the rectangle is 8 dm 6cm and the other side is 5cm larger.
January 29, 2021 | education
| The perimeter of a rectangle is the sum of all the sides of the rectangle.
Decision:
Let’s express the known side of the rectangle in cm:
8 dm 6 cm = 86 cm.
1) Find the second side of the rectangle:
86 + 5 = 91 (cm) – the second side of the rectangle.
2) Find the perimeter of the rectangle:
86 + 86 + 91 + 91 = 354 (cm) – the perimeter of the rectangle.
Let’s express the perimeter in dm and cm:
354 cm = 35 dm 4 cm.
Answer: the perimeter of the rectangle is 35 dm 4 cm.
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