Answer:
1/3
Explanation:
We can see that the units of the lengths aren't the same, in order to make this question easier to understand, let's transfer the units first.
The three sides are 1.2m(which is 120cm), 1m(which is 100cm), and 40cm.(It's better to transfer all of them into centimeter so that their will be no decimals)
Now, from 120cm, 100cm and 40cm, surely 40cm is the shortest, and 120cm is the longest, so we divide 40 into 120: 40/120=1/3
Hope this will help:)