is there a way to examine if an angle is a right angle programmatically?

Question

i plot an angle in python

here is the code

x = [0,0.5,1]
y = [0,0.5,0]
plt.scatter(x,y)
plt.plot(x,y)
plt.show()

is there a way to examine if the angle is a right angle programmatically?

Answer 1

Yes, there is.

x = [0,0.5,1]
y = [0,0.5,0]
points = [np.array(point) for point in zip(x,y)]
a, b, c = points
ba = a - b
bc = c - b
cosine_angle = np.dot(ba, bc) / (np.linalg.norm(ba) * np.linalg.norm(bc))
angle_rad = np.arccos(cosine_angle)
angle_deg = np.rad2deg(angle_rad)
print(angle_deg) # 90.0