Determine whether the points P(-3, 2),Q(3, 4), and R(-1,-4) can be the vertices of a triangle. If so, classify the triangle as acute, right, or obtuse. Justify your answer.
(Lesson 9-1)
A. acute because c² < a² + b²
B. right because c² = a² + b²
C. obtuse because c² > a² + b²
D. cannot form a triangle