Answer:
The shape includes a curve; all polygons are supposed to have straight sides, which this shape does not.
I would say its D, but im not 100 percent sure
Answer:
16
Step-by-step explanation:
Apply PEMDAS:
Solve the exponent, multiply from left to right, and then subtract and add from left to right.

Yes, because they are similar(or you can call congruent), proved by SAS or simply HL.
Answer:
x = 3
Step-by-step explanation:
First, you will pick the first equation :
(x*20)
Then the next,
(x*20) + 5
Then the last equation,
(x*20) + 5 = 5*13
Then you solve
20x + 5 = 65
20x = 65 - 5
20x = 60
20x/20 = 60/20
x = 3