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FinnZ [79.3K]
3 years ago
10

Find the surface area (the triangle are right triangles).

Mathematics
1 answer:
Igoryamba3 years ago
4 0

Answer:

67.5

Step-by-step explanation:

Well area of a triange is 1/2bh so we can find the side closest to us by doing

1/2(3x4) which is 12

the other side would be 1/2 (3x5) which is 7.5

the bottom side would be 1/2(8x4) so 16

and 1/2 (3x8) so 12

1/2 (8x5) so 20

add those together to get 67.5

Hope this helped ya!

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