Perimeter 18cm, rectangle area 14cm2 find the sides of the rectangle
| December 12, 2020 | education
Perimeter = 18 = 2 (a + b);
Area = 14 = a • b, take out a and get a = 14 / b, substitute the resulting equation into the perimeter.
18 = 2 • 14: b + 2 • b | • b
18b = 28 + 2 • b ^ 2;
D = 324-224 = 100;
b = 7, we find a from the area
a = 14/7 = 2,
Answer: 2.7
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