Question

The figure below shows a parallelogram ABCD with diagonals AC and BD.



If it is given that angle DAB is 60°, which statement will guarantee that the parallelogram is a rhombus?
Answer
Angle CAB is 30°.
Angle CAB is 30°, and angle DBA is 30°.
Angle CAB is 30°, and angle DBA is 60°.
Angle ABC is 120°, and angle BCD is 60°.

Answer 1

I would say C.

Answer 2

I think it's Angle CAB is 30°, and angle DBA is 60°.
Since diagonals of rhombus are perpendicular to each other..
BTW, you missed the figure :|

Answer 3

Me too, oh sorry.

Answer 4

Never mind... I can still picture it in my mind :|

Answer 5

:P