Which of the following is not a valid conclusion given parallelogram ABCD with diagonals AB and BD? a
AB=CD
b
AC=BD
c
d
m

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Write the pair of fractions as a pair of fractions with a common denominator

How do you write something in scientific notation?