find the perimetre of a rectangle who length is 4 cm and its diagnol is 5 cm
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Answer:
=> 18 cm
Step-by-step explanation:
=> Given the length of the side of the rectangle L = 4cm
=> the length of diagonal is D = 5cm
=> therefore L²+B²= D²
=> 4²+B²= 5
=> B²= 10
=> B=5
We know that the perimeter of the rectangle is 2(L+B)
=> 2(4+5)= 18cm
=> 18 cm
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