Which of the following sets of four coordinates could not be the four vertices of a square?
a. (-1,0), (-1,2), (-3,2), (-3,2)
b. (1,3), (3,-3), (1,-5), (3,-5)
c. (1,0), (4,3), (4,-3), (7,0)
d. (0,-2), (0,-4), (-3,2), (-3,-4)

the answer is 489

step-by-step explanation:

the anwser is d) 75°

step-by-step explanation:

i dont know men

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!