Answer:
The missing side length is 5 cm
Explanation:
We see that 4cm is on the top and 9 cm is on the bottom.
All we need to do is subtract 4 from 9
9-4=5
the missing length is 7cm and the whole perimeter is 52cm
to get the missing length take 4 and 11 and subtract it
4-11=7
then add it all together and you get 52cm
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