Answer:
C. 105 
Step-by-step explanation:
<em><u>The formula for a regular polygon is:</u></em>
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→ p is the perimeter and a is the apothem

105
Take the first 9 is in yours tens place so you want to take the second 9 and round up because anything 5 or more goes up and 4 or less stays the same
Answer:
the length of the two equal sides: 8m
the length of the third side: 8m-4m=4m
8m×2+4m=20m
It's a cube so x should also equal 6