SOLUTION: . Show that A(-4, 2), B(1, 4), C(3, -1) and D(-2, -3) are vertices of a square

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Question 1096708: . Show that A(-4, 2), B(1, 4), C(3, -1) and D(-2, -3) are vertices of a square
Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
 

Show that the four red triangles around the smaller 
purplish-blue square in the middle are all congruent 
right triangles by side-angle-side.  Then CPCT shows
that the four red hypotenuses are congruent.  Then use the
fact that the two acute angles of a right triangle are 
complementary to show that four interior angles of the
larger square-to-be-proved are right angles.

Edwin