WILL GIVE BRAINLIEST AND 40 POINTS.
The coordinates of the vertices of △DEF are D(−4, 1) , E(3, −1) , and F(−1, −4) .
Which statement correctly describes whether â–³DEF is a right triangle?
A. â–³DEF is a right triangle because DF is perpendicular to EF .
B. â–³DEF is a right triangle because DE is perpendicular to EF .
C. â–³DEF is a right triangle because DE is perpendicular to DF .
D. â–³DEF is not a right triangle because no two sides are perpendicular.
