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UkoKoshka [18]
3 years ago
10

Help ASAP!!! Please and thank you so much

Mathematics
2 answers:
PilotLPTM [1.2K]3 years ago
8 0
Rectangle on the left = 3 × 4 = 12

Rectangle in the middle = 3 × 2 = 6

Rectangle on the right = 4 × 3 = 12

Add:

12 + 6 + 12 = 30

Answer = 30

Hope this helped☺☺
Galina-37 [17]3 years ago
4 0
Let's split this up in sections. We have three sections.
Left
As you can tell, the side says 4 while the top says 3.
4×3
12
Middle
If you can tell, the edge says 2 inches, so to find the side of the middle, we subtract. 
4-2
2×3
6
Right 
It's the same as the left.
3×4
12
Let's add them together.
12+12+6
24+6
30
30 in²
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If the dimensions of a rectangular prism are 39 mm × 12 mm × 15 mm, then what is the surface area
grin007 [14]

Answer:

\huge\boxed{SA=2466\ (mm^2)}

Step-by-step explanation:

The formula of a Surface Area of a rectangular prisms:

SA=2(lw+lh+wh)

<em>l</em><em> - length</em>

<em>w</em><em> - width</em>

<em>h</em><em> - height</em>

<em />

We have:

l=39mm;\ w=12mm;\ h=15mm

Substitute:

SA=2\bigg((39)(12)+(39)(15)+(12)(15)\bigg)\\\\SA=2(468+585+180)\\\\SA=2(1233)\\\\SA=2466\ (mm^2)

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