2. Find the SA
GUIDED PRACTICE
Circle: A= 3.14 x 8 x 8= 200.96
C= 3.14 x 2 x 8 = 50.24
Rectangle: A= 50.24 x 20 = 1004.8
200.96 + 200.96 +1004.8 = 1406.7 in2
3. Cylinder: a 3-D figure with two congruent
circles for bases.
r
h
How can I find the length of this rectangle?
4. Find the SA 3
14
Circle: A = π r2
A= 3.14 x 3 x 3= 28.26
C=πx2xr
C= 3.14 x 2 x 3 = 18.84
Rectangle: A = b x h
A= 18.84 x 14 = 263.76
28.26 + 28.26 +263.76 = 320.28 = 320.3 units2
5. Homework
Page 546 #14-16
You do not have to draw the nets, but you
may draw them if it helps you find the surface
area.
