This is the last one! Picture is provided!! R is the midpoint of AC, and S is the midpoint of BC.
AB = 12
Find RS.

RS = 6

Step-by-step explanation:

The line joining the midpoints of 2 sides of a triangle is half the length of the third side, that is

RS = AB = × 12 = 6

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!