Surface Area of Triangular Prism 1

Finding: Surface Area of
Triangular Prism 1
- Mr Kim

Surface Area of the following
prisms will be explained in this
lesson
Starts from slide number 36

9 m
16 m
11 m
This is a Triangular
Prism

9 m
16 m
11 m
Triangular Prism
has 5 faces

We must calculate the
Total Area of all 5 Faces

9 m
16 m
11 m
Front Area is

2
1
Always times by a half
for Triangles

9 m
16 m
11 m
Front Area is
9
2
1


9 m
16 m
11 m
Front Area is
119
2
1


9 m
16 m
11 m
Now, the Back Area is
the same as the Front
so…
119
2
1


9 m
16 m
11 m
2119
2
1

Now, the Back Area is
the same as the Front so
times by 2

9 m
16 m
11 m
Now we are going to find
the Side Area
2119
2
1


9 m
16 m
2119
2
1

11 m
the Side Area

9 m
16 m
 2119
2
1
11 m
Make sure to add that on

The Side Area is a Rectangle
so just multiply the numbers
9 m
16 m
 2119
2
1
11 m

9 m
16 m
 2119
2
1
11 m
16

9 m
16 m
 2119
2
1
11 m
1216

9 m
16 m
 2119
2
1
11 m
But the other Side is the
same as well so…
1216

9 m
16 m
 2119
2
1
11 m
But the other Side is the
same as well so times by 2
21216 

9 m
16 m
 2119
2
1
11 m
the Bottom Area
21216 

9 m
16 m
 2119
2
1
11 m
21216 
the Bottom Area

9 m
16 m
 2119
2
1
11 m
 21216
as well

9 m
16 m
 2119
2
1
11 m
The Bottom Area is a
Rectangle as well so just
multiply the numbers
 21216

9 m
16 m
 2119
2
1
11 m
 21216
9

9 m
16 m
 2119
2
1
11 m
 21216
169

9 m
16 m
 2119
2
1
11 m
Putting this altogether in
the calculator gives…
 21216
169

9 m
16 m
 2119
2
1
11 m
 21216
2
627169 m
Our Final Answer!

7 cm
8 cm
12.5 cm
Once again we need to
calculate the Area of all
5 Faces

7 cm
8 cm
12.5 cm
Front Area is

7 cm
8 cm
12.5 cm
Front Area is

2
1

7 cm
8 cm
12.5 cm
Front Area is
87
2
1


7 cm
8 cm
12.5 cm
And the Back Area is the
same as the Front so…
87
2
1


7 cm
8 cm
12.5 cm
287
2
1

And the Back Area is the
same as the Front so
times by 2

7 cm
8 cm
12.5 cm
the Right Side Area
287
2
1


7 cm
8 cm
12.5 cm
 287
2
1

7 cm
8 cm
12.5 cm
The Right Side is a Rectangle
 287
2
1

7 cm
8 cm
12.5 cm 5.126.10 
 287
2
1
The Right Side is a Rectangle

7 cm
8 cm
12.5 cm
the Left Side Area
5.126.10 
 287
2
1

7 cm
8 cm
12.5 cm
the Left Side Area
 287
2
1
5.126.10 

7 cm
8 cm
 287
2
1
 5.126.1012.5 cm

7 cm
8 cm
12.5 cm
The Left Side is a
Rectangle as well
 287
2
1
 5.126.10

7 cm
8 cm
12.5 cm
So the Left Side Area is
 287
2
1
 5.126.10

7 cm
8 cm
12.5 cm
7
 287
2
1
 5.126.10

7 cm
8 cm
12.5 cm
7
 287
2
1
 5.126.10
If it’s 12.5 cm there

7 cm
8 cm
12.5 cm
7
It’s 12.5 cm there as well
 287
2
1
 5.126.10
12.5 cm

7 cm
8 cm
12.5 cm
5.127
 287
2
1
 5.126.10
It’s 12.5 cm there as well
12.5 cm

7 cm
8 cm
12.5 cm
5.127
Now finally, we need to
find the Bottom Area
12.5 cm
 287
2
1
 5.126.10

7 cm
8 cm
12.5 cm
 5.127
12.5 cm
 287
2
1
 5.126.10

7 cm
8 cm
12.5 cm
 5.127
5.128
12.5 cm
 287
2
1
 5.126.10

7 cm
8 cm  5.127
5.128
12.5 cm
12.5 cm
 287
2
1
 5.126.10

7 cm
8 cm  5.127
5.128
12.5 cm
2
376cm
Our Final Answer!
12.5 cm
 287
2
1
 5.126.10

Surface Area of Triangular Prism 1

More Related Content

What's hot (20)

Similar to Surface Area of Triangular Prism 1 (20)

More from Moonie Kim (15)

Recently uploaded (20)

Surface Area of Triangular Prism 1