Calculate the Standard Deviation of the following set of data.14, 15, 16, 16, 9, 3, 16, 20, 29, 12

What are the values of m∠abc, m∠cbf, m∠abd and m∠dbe in the given figure? explain or show your work?

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.)

Pls brainliest will be awarded if answer is correct