Suppose ABCD is a rhombus with AB=12 inches. The midpoints of its sides are joined to form a quadrilateral. What is the length of a diagonal of this quadrilateral?
(please give an explanation)

Ineed to find the answer to number 2

You have just applied, and have been approved for a $58,000 mortgage. the rate quoted to you by the lender is 6.1% for a 30 year fixed mortgage. determine how much of your third month’s payment goes towards the principal. $56.65 $56.93 $57.22 $57.51

Use the squared identities to simplify sin^2x cos^2x