Which quadrilaterals do you think can be decomposed into two identical triangles using only one line? Please help! Hurry!

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

(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.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).