Jon leans a 30-ft long ladder against the side his house. The ladder reaches to a height of 15.7 ft up the side of the house. What is the angle of elevation of the ladder to the nearest
tenth of a degree?
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What is the maximum total area that 450cm of string can enclose if it is used to form perimeters of two adjoining rectangles as shown?

This is about circle theorems. someone asap : (

(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.