如何创建带有边和角的三角形的图像

import matplotlib.pyplot as plt

fig, ax = plt.subplots(figsize=(5, 5))
ax.set_facecolor('white')

point1 = (0, 0)
point2 = (1, 1)
point3 = (2, 0)

# 连接顶点，绘制三角形边
plt.plot([point1[0], point2[0]], [point1[1], point2[1]], linewidth=2, color='red')
plt.plot([point2[0], point3[0]], [point2[1], point3[1]], linewidth=2, color='green')
plt.plot([point3[0], point1[0]], [point3[1], point1[1]], linewidth=2, color='blue')

# 标记角度
plt.annotate('α', xy=(0.2, 0.1), fontsize=12)
plt.annotate('β', xy=(1.8, 0.1), fontsize=12)
plt.annotate('γ', xy=(1, 0.7), fontsize=12)

# 绘制顶点
plt.scatter([point1[0], point2[0], point3[0]], [point1[1], point2[1], point3[1]], color='black', s=30)

# 显示图像
plt.show()