import numpy as np
import matplotlib.pyplot as plt
from matplotlib.patches import Circle

n = 20
r = 100

fig, ax = plt.subplots(subplot_kw={"aspect": "equal"})
circles = [
    Circle((r * np.sin(phi), r * np.cos(phi)), r, fc="b", alpha=0.1)
    for phi in np.arange(0, 2 * np.pi, 2 * np.pi / n)
]
for circle in circles:
    ax.add_artist(circle)
ax.set_xlim(-2 * r, 2 * r)
ax.set_ylim(-2 * r, 2 * r)
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)

plt.show()