What would be the best way to describe triangle DEF with vertices D(1, 5), E(-3, 1), and F(-1, -3)?

Question

Right, isosceles, scalene, or equilateral?

Answer 1

triangle DEF is a scalene triangle
DE = 5.67
DF = 8.246
EF = 4.472

Answer 2

If you check the distances from point to point, they are the same (you don't have to calc the distances, just check the different in coordinates). So it is equilateral.