how to find the area of rectangle if perimeter and it's length is given ?
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example, if the length and perimeter is given, the width can be calculated. Perimeter = 2(length + width), width = (Perimeter/2) - length. Now, the required values to find the area of a rectangle are known. So, these values can be substituted in the formula: Area = length × width.
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Answer:
Step-by-step explanation:
The perimeter of a rectangle =2(L + B).we can get the length of other side by change of subject of formula.
E.g say perimeter=30cm and L=10cm ;p=2(L+ B) ;30=2(10+B) ;dividing through by 2 ;15=10+B ;collect like terms ;15-10=B :. B=5cm
Area of rectangle=L x B ;L=10 and B=5 :.Area=50cm²
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