18. A recent article claimed that women are waiting longer to have their first
1 answer:
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Answer:
Decagon
Step-by-step explanation:
We can use the general equation to determine the sum of interior angles:
Since we know the sum of interior angles (I.A.) is 1440°, we must figure out n - the number of sides and so:
Since n=10 this means that it is a 10 sided shape meaning it's a decagon.
Check the picture below.
is simply a 9x9 square, so its perimeter is simply 4*9.
