Can someone help me please

Ill mark the brainliest if you me with the these three questions 7,8,9

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319