Question

DEF has vertices D(0,0), E(1,4), and F(5,2). is DEF scalene, isosceles, or equilateral?

Answer 1

EXPLANATION

If DEF has vertices (0,0), E(1,4) and F(5,2) the points are:

The distance between points (0,0) and (5,2) is

$\text{distance}=\sqrt[]{(5-0)^2+(2-0)^2}$