Answer:

Step-by-step explanation:
Given that,
The radius of the cylinder, r = 3
Height of the cylinder, h = 12
We need to find the surface area of the cylinder. The formula for the surface area of a cylindrical object is given by :

So, the surface area of the cylinder is equal to
.
we are going to times the both sides by two
From the figure, we already have
RT = UT
and
TK = TK
Since these are already conditions for two sides being congruent, we only need an included angle to be congruent. So, the missing information is
∠RTK <span>≅ </span>∠<span>UTK</span><span />
Down because the slope is negative
18<span>,36,54,72,90,108,126,144,162,180,198,216,234,252,
hope this helps!</span>