Find the area of a rectangle whose perimeter is 10 cm square. one of the old rectangle 12 cm.
| May 6, 2021 | education
The perimeter of the rectangle is 100 cm and one of its sides is 12 cm.
The perimeter is the sum of the lengths of all sides. Let’s denote the unknown side by x, then:
x + x + 12 + 12 = 100.
2x + 24 = 100.
2x = 76.
x = 38 is the second side of the rectangle.
area of the rectangle = 38 * 12 = 456 (cm ^ 2).
Answer: 456 (cm ^ 2).
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