In ∆ABC the coordinates vertices A and B are A (-2, 4) and B (-1, 1). For each of the given coordinates of vertex C, is ∆ ABC a right triangle?
C(-2, 1)
C(0,4)
C(2,2)
C(-2, 1)
C(0,4)
C(2,2)
1 Answer
The only right triangle is
Explanation:
The triangle will be a right triangle if either dot-product is zero:
Not a right triangle.
Not a right triangle.
This is a right triangle.