Answer:
A
Step-by-step explanation:
By definition, all sides of a regular polygon are equal in length. If you know the length of one of the sides, the area is given by the formula:

where s is the side length, n is the number of sides.
In your case, s=20 ft, n=5,so

Answer:
A, C, D I think
Step-by-step explanation:
Hope this helps and feel free to answer my recent question ! :)
Answer:
36
Step-by-step explanation:
Let's start by taking two of the smallest prime numbers: 2&3
Then we square both of them:
2²=4
3²=9
Then we multiply 4*9 to get 36.
Arctan(3.4) ≈ 73.6°. You can view the 3.4 as the slope of a line. Then it is clear the the 52.9 and 99.8 can't be right. If you have to do this without a calculator, it can be quite tricky...