Answer:
Your answer is 2.5
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square one side a
Area=a.a
49=a.a
7.7=a.a
a=7
Perimeter=4a=4.7=28
Divide 83.524 by pi then take half of that answer .
the answer should be 13.29 or 13.3
Answer:

Step-by-step explanation:
I did this bfor. You have got to trust me.
2 more 10s then 11 is 31
1 more 10s then 11 is 21
3 more 10s then 11 is 41.
basic math :)