Find the measure of the indicated angle x

36°

Step-by-step explanation:

all the interior angles of a triangle add up to 180°

78 + 66 = 144

180 - 144 = 36°

for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d