The formula for the surface area of a circular cylinder is SA = 2πr 2 + 2πrh cubic units. What do 2πr 2 and 2πrh represent?

Remember

area=pir^2

circumference=2pir

the surface aera if you thinkg about it is

2 times the tops+area around

the tops are circles so 2*pir^2 is tops

the area around is a rectangle that has been wrapped around the cylinder,

the hieght is the legnth and the circumference is width

so 2hpir is the area around

2pir^2 is the areas of the tops

2hpir is the area around