i cant solve this question.

Question

i cant paste picture of it. its link

https://www.chegg.com/homework-help/questions-and-answers/student-project-deriving-formula-area-circle-geometric-formulas-take-granted-today-first-d-q56566085

Answer 1

The main trick to the procedure is once you get an equation for the area of a regular polygon in terms of n,r and sin(θ) is to find an expression for n. From a previous step you found θ as a function of n. Solve for n and substitute that into the polygon area formula and then take the limit. And voilà, you have πr².