Guys please help me and explain the answer please

Secant be and cf intersect at point d inside a what is the measure of cde

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio

Polygon abcd is a rectangle what is the area