Shape & Space Surface Area

Surface Area of Prisms - Review Label Faces and Draw Net Label sides using hash marks or lengths Calculate the area of each face Add all the areas together to find Total Surface Area

Surface Area of Cylinders

Ex. 1 – Find the Surface Area

What are the steps? A C B Draw Net Label Faces Label the lengths 7 in 14 in C Draw Net Label Faces Label the lengths What about the length of the rectangle? B 7 in

Remember… Length of the rectangle is also equal to the length around the circle (Circumference) 7 in 14 in C 7 in B

Remember.. To find Circumference.. C =  πd or C = 2πr In our case, we have the radius, so we will use: C = 2πr C = 2(3.14)(7 in) C = 43.96 in

Now label the length A 7 in L = 43.96 in 14 in C 7 in B

4. Find all the areas A 7 in L = 43.96 in 14 in C 7 in B

Find Areas A B C L = 43.96 in 7 in 7 in W = 14 in Area A A = π x r 2 A = (3.14)(7 in)2 A = (3.14)(7 in)(7 in) A = 153.86 in2 Area B A = π x  r 2  A = (3.14)(7 in)2 A = (3.14)(7 in)(7 in) A = 153.86 in2 Area C A = L x W A = (43.96 in)(14 in) A = 615.44 in2 Total Surface Area = 153.86 in2 + 153.86 in2 + 615.44 in2 = 923.16 in2

Ex. #2 – Find the Surface Areas

More Practice: Workbook pages 90-92 Practice Review Sheet – Prisms & Cylinders