If you could help me that would make my day :( please

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

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

Write the function for the graph. (1.8) (0,4)