Answer:
Its not equilateral.
Explanation:
An equilateral triangle has equal sides so we calculate their lengths.
The distance between (2, 2) and (-2, -2)
= √((2 - -2)^2 + (2 - -2)^2
= √32
Between (-2,-2) an d (-2√2, 2√3)
= √((-2 - -2√2)^2 + (-2 - 2√3)^2)
= √30.54
This is not eqaul to length of the other side so they are not the vertices of an equilateral triangle.