Pls help me pls

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Abcd is a square. what is the measure of angle bac

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )