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egoroff_w [7]
3 years ago
8

HELPPPPPP I DON'T KNOW THIS !! I will give brainliest to the CORRECT ANSWER :(

Mathematics
2 answers:
Kamila [148]3 years ago
4 0

Step-by-step explanation:

260 square inches

is the right answer

chubhunter [2.5K]3 years ago
3 0

Answer:

260 in²

Step-by-step explanation:

<u>1) Find the total area of the triangular sides</u>

A=\frac{1}{2}bh

Plug in 10 in as the base and 8 in as the height

A=\frac{1}{2}(10)(8)\\A=\frac{1}{2}(80)\\A=40

Multiply the area by 4 (for the 4 triangular surfaces)

40*4\\=160

Therefore the total area of the triangular sides is 160 in².

<u>2) Find the area of the square base</u>

A=l^2

Plug in 10 as the length

A=10^2\\A=100

Therefore, the area of the square base is 100 in².

<u>3) Add the areas together</u>

100 in² + 160 in²

= 260 in²

Therefore, the surface area of the solid is 260 in².

I hope this helps!

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