Answer:
.I will list some characteristics:
The polar coordinates only uses 2 variables:
r, that is the radius and can have values equal or greater than zero, this is:
0 ≤ r
and θ, which is the angle, we measure the angle from the x-axis and it grows counterclockwise. An interesting this about this variable is that, while we can have any value for θ, we have that θ is a periodic variable with a period of 2*pi
So if we have θ = A, is the same that having θ = A + n*2*pi, where n can be any integer number
And we can transform the rectangular cordinates to polar cordinates by:
x = r*cos(θ)
y = r*cos(θ)