The graph shows the locations of point C and point D. Point E is graphed at (n, 2). The distance from point D to point E is equal to the distance from point D to point C.
What is the distance from point D to point E? What is the value of n?

(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.