Raheem made a net of a triangular pyramid as shown. He wants to find the lateral area of the pyramid. Which sum represents the lateral area of the pyramid? Twice the area of face D. The sum of the areas of faces A, B, and C. Twice the sum of the areas of faces A, B, and C. The sum of the areas of faces A, B, C, and D.

(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.