Please help. Urgent.

One Link in chain was made from a cylinder that has a radius of 2 cm and a height of 20 centimeters. How much plastic coating would be needed to the surface of the chain link? Use 3.14 for pi.

251.2cm^2
314cm^2
345.4cm^2
471cm^2

Anyone know? is appreciated! will mark brainliest if correct!

What is the solution to the equation in the & show work i’m very

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2