Bc || ad and cd || ba because the
therefore,
abcd is a parallelogram because both pairs of opposite
sides are parallel.
o
o
o
o
lengths of consecutive sides are not equal
slopes of opposite sides are equal
lengths of opposite sides are equal
slopess of consecutive sides are not equal

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!