# your code here

# your code here

##### Don't modify this cell #####
student_tup = (('21101', '최성훈', '010-1234-4500'), ('21102', '김은지', '010-2230-6540'), ('21103', '이세은', '010-3232-7788'))

# your code here

# your code here

# your code here

# your code here

##### Don't modify this cell #####
lst = [10, 30, 40, 50, 30, 30, 20, 20, 20, 10, 30]

# your code here

import os
from google.colab import drive
drive.mount('/content/drive')

os.chdir('/content/drive/MyDrive/Colab Notebooks')

##### Don't modify this cell #####
import matplotlib.pyplot as plt

def plot_tri(XYZ):
  XYZ.append(XYZ[0])
  xs, ys = zip(*XYZ)
  plt.figure(figsize=(5,5), dpi=100)
  plt.plot(xs,ys, color='b')
  plt.scatter(0, 0, color='k', label="origin")
  plt.xlabel("x-axis")
  plt.ylabel("y-axis")
  plt.legend()
  plt.xlim(-1000, 1000)
  plt.ylim(-1000, 1000)
  plt.grid()
  plt.show()

ABC_1 = [[-300, 400], [-140, -800], [835, 847]]
ABC_2 = [[-170,40], [-400, -720], [570, -650]]

plot_tri(ABC_1)
plot_tri(ABC_2)

##### Don't modify this cell #####
ABC = [[-300, 400], [-140, -800], [835, 847]]
ABC.append(ABC[0])
xs, ys = zip(*ABC)
ABO = [ABC[0], ABC[1], [0,0]]
ABO.append(ABO[0])
xs1, ys1 = zip(*ABO)
AOC = [ABC[0], [0,0], ABC[2]]
AOC.append(AOC[0])
xs2, ys2 = zip(*AOC)
OBC = [[0,0 ], ABC[1], ABC[2]]
OBC.append(OBC[0])
xs3, ys3 = zip(*OBC)


plt.figure(figsize=(5,5), dpi=100)
plt.plot(xs,ys, color='k')
plt.plot(xs1,ys1, color='b', linestyle=':', alpha=0.3)
plt.plot(xs2,ys2, color='b', linestyle=':', alpha=0.3)
plt.plot(xs3,ys3, color='b', linestyle=':', alpha=0.3)
plt.scatter(0, 0, color='k', label="origin")
plt.xlabel("x-axis")
plt.ylabel("y-axis")
plt.legend()
plt.xlim(-1000, 1000)
plt.ylim(-1000, 1000)
plt.grid()
plt.show()


# your code here