平面向量的係數積(1)
Author: 藍邦偉  老師

向量的係數積(1)

$ \overrightarrow{a} $

A = (9.386461225896097, 0.6968681280917857)
c = Circle(A, 1)
K_1: (x(Corner[1]), 0)
K_2: (x(Corner[2]), 0)
B = Point(c)
a = Vector(A, B)
r = -2 (slider from -4 to 4, step 1)
B': A + (r * (x(B) - x(A)), r * (y(B) - y(A)))
b = Vector(A, B')
text2: r + "\overrightarrow{a}"