The perimeter of a rectangle is 50 cm and its length is 15 cm find its diagonal.
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perimeter= 50 cm
length= 15 cm
50 = 2(l+b)
50=2(15+b)
25=15+b
25-15=b
10
diagonal= l²+b²
h² =15²+10²
h² =225+100
h=√325
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