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gafran
05.06.2021 •
Mathematics
What is the perimeter of △ABC?
Round each step to the nearest tenth.
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Ответ:
9514 1404 393
15.8
Step-by-step explanation:
The distance formula is ...
d = √((x2 -x1)^2 +(y2 -y1)^2)
so the distance from A to B is ...
AB = √((-1-5)^2 +(1-(-1))^2) = √((-6)^2 +2^2) = √40 ≈ 6.3
Lengths BC and CA are similarly computed. (A spreadsheet does this nicely.)
The perimeter is the sum of the side lengths. It is ...
P = AB +BC +CA
P = 6.3 + 4.1 + 5.4
P = 15.8
The perimeter of ∆ABC is 15.8 units.
Ответ:
the first one is volume the second one is density
Step-by-step explanation:I took the test