Name:
Surface Area
surface area =
320 cm2
4 cm
top
front
bottom
right
side
4 cm x 7 cm =
4 cm x 12 cm =
7 cm x 12 cm =
4 cm x 12 cm =
4 cm x 7 cm =
7 cm x 12 cm =
12 cm
left
side
7 cm
area of left side:
area of top:
area of front:
area of bottom:
area of right side:
area of back:
28 cm2
48 cm2
84 cm2
48 cm2
28 cm2
+ 84 cm2
7 cm
Surface area is the total area of all faces of a figure. To find the
surface area of a rectangular prism, imagine it unfolded into six
rectangles. Find the area of each rectangle and add them together.
The sum is the surface area of the rectangular prism.
back
4 cm
12 cm
Find the surface area of the following figures.
8m
4m
6m
6 mm
10 mm
12 cm
15 mm
9 cm
5 cm
area of left side:
x
=
area of top:
x
=
area of front:
x
=
area of bottom:
x
=
area of right side:
x
=
area of back:
x
=
area of left side:
x
=
area of top:
x
=
area of front:
x
=
area of bottom:
x
=
area of right side:
x
=
area of back:
x
=
area of left side:
x
=
area of top:
x
=
area of front:
x
=
area of bottom:
x
=
area of right side:
x
=
area of back:
x
=
surface area =
surface area =
surface area =
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ANSWER KEY
Surface Area
surface area =
320 cm2
4 cm
top
front
bottom
right
side
4 cm x 7 cm =
4 cm x 12 cm =
7 cm x 12 cm =
4 cm x 12 cm =
4 cm x 7 cm =
7 cm x 12 cm =
12 cm
left
side
7 cm
area of left side:
area of top:
area of front:
area of bottom:
area of right side:
area of back:
28 cm2
48 cm2
84 cm2
48 cm2
28 cm2
+ 84 cm2
7 cm
Surface area is the total area of all faces of a figure. To find the
surface area of a rectangular prism, imagine it unfolded into six
rectangles. Find the area of each rectangle and add them together.
The sum is the surface area of the rectangular prism.
back
4 cm
12 cm
Find the surface area of the following figures.
8m
4m
6m
area of left side:
8m
x
4m
=
32 m2
area of top:
4m
x
6m
=
24 m2
area of front:
6m
x
8m
=
48 m2
area of bottom:
4m
x
6m
=
24 m2
area of right side:
8m
x
4m
=
32 m2
area of back:
6m
x
8m
=
48 m2
area of left side:
6 mm
10 mm
15 mm
15 mm x 10 mm = 150 mm2
area of front:
15 mm x 6 mm = 90 mm2
area of bottom:
15 mm x 10 mm = 150 mm2
12 cm
area of back:
9 cm
5 cm
208 m2
surface area =
600 mm2
surface area =
426 cm2
6 mm x 10 mm = 60 mm2
area of top:
area of right side:
surface area =
6 mm x 10 mm = 60 mm2
15 mm x 6 mm = 90 mm2
area of left side:
9 cm x 12 cm = 108 cm2
area of top:
9 cm x 5 cm = 45 cm2
area of front:
5 cm x 12 cm = 60 cm2
area of bottom:
9 cm x 5 cm = 45 cm2
area of right side:
9 cm x 12 cm = 108 cm2
area of back:
5 cm x 12 cm = 60 cm2
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