Problema Solution
has vertices D(1, 3), E(3, –1), and F(–2, –1). Determine if is an equilateral, isosceles, or scalene triangle.
Answer provided by our tutors
we will use the Distance Formula
DE^2 = (1 - 3)^2 + (3 - (-1))^2 = 20
EF^2 = (3 - (-2))^2 + (-1 - (-1))^2 = 25
DF^2 = (1 - (-2))^2 + (3 - (-1))^2 = 25
the triangle is isosceles.