Alright give me a second ok
Answer:
The Exact answer is 287740837743404332336.
The Decimal Answer is 2.87740837 ⋅ 10
^20.
10.4. You multiply .80 times 12 and get 9.6. Then you add 9.6 to 0.80 and get 10.4
I’m pretty sure it would be equilateral because all the sides are the same:)