Question

Divide segment mn of length 9cm into 5 congruent parts

Answer 1

Hey  friend, Harish here.
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Here is your answer
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The objective is to split 9 into 5 segments of equal length.

So, Divide 9 by 5 .

We get , 9/ 5 = 1.8 cm

Therefore 1.8cm is the answer. 
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Hope my answer is helpful to u.