. Consider the case of ????A and ????B of lengths 5 and 12, respectively, with m∠???? = 180°.
a. Is ????BC a triangle?
b. What is the easiest method to find the distance between ???? and ?????
c. Can you use the law of cosines to find the distance between ???? and ????? If so, perform the calculations. If not,
show why not.
d. Summarize what you have learned in parts (a) through (c).