Question

Am I Right???

Answer 1

Your first one needs to be changed. Recall that x = r cos(), but y = r sin(). The difference is in the cos vs. the sin.

Answer 2

did you guess or did you actually try?

Answer 3

Oh wait, is the first one x^2 + y^2 = x?

Answer 4

And the second one x² + (y - 2)² = 4 ?