Which diagram shows the most useful positioning and accurate labeling of an isosceles trapezoid in the coordinate plane?

Question

anonymous · Answer

B. because the length 2 sides are equal ( slope 1 = - slope 2).
D is not found :P

anonymous · Answer

Which statement is true?
  A. All squares are rectangles. 	
  B. All quadrilaterals are rectangles. 	
  C. All parallelograms are rectangles. 	
  D. All rectangles are squares.

anonymous · Answer

i chose b and it was wrong.

anonymous · Answer

you didn't include the full answer and i told you my reason
all square are rectangles 
all special cases are from the general case.