The quadrilateral formed by joining the mid-points of the sides of a quadrilateral ABCD, taken in order, is a rhombus if:
A. ABCD is a parallelogram.
B. ABCD is a rhombus.
C. the diagonals of ABCD are equal.
D. the diagonals of ABCD are perpendicular to each other.
Answer:C
The quadrilateral formed by joining the mid-points of the sides of a quadrilateral ABCD, taken in order, is a rhombus if:
A. ABCD is a parallelogram. B. ABCD is a rhombus. C. the diagonals of ABCD are equal. D. the diagonals of ABCD are perpendicular to each other.