Simple geometry problem. someone pls explain this to me.

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)