Is ΔABC with vertices A(–2, 3), B(2, 0), and C(–1, –4) a right triangle?

ΔABC is a right triangle because .

ΔABC is a right triangle because .

ΔABC is a right triangle because .

ΔABC is not a right triangle.

Question

Is ΔABC with vertices A(–2, 3), B(2, 0), and C(–1, –4) a right triangle?    

 ΔABC is a right triangle because .

       ΔABC is a right triangle because .

       ΔABC is a right triangle because .

       ΔABC is not a right triangle.

anonymous · Answer

Someone please help me? I don't know how to do this problem!

anonymous · Answer

use 
a^2=b^2=c^2

anonymous · Answer

I honestly still don't get it. Math isn't my specialty.

anonymous · Answer

@nonamenever

anonymous · Answer

well first find the lenghts of the tri then use this equation if its true then its a tri