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Alona [7]
3 years ago
5

THE vertices of ABC are A(-2,2,B(6,2,and c(0,8). The perimeter of ABC is

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
4 0
Using the distance formula:

AB^2 = (-2-6)^2 = (2-2)^2
          = 64
    AB = 8 units
BC^2 = (6-0)^2 + (2-8)^2
          = 36 + 36
          = 72
    BC = 6 root 2
AC^2 = (-2-0)^2 + (2-8)^2
          = 4 + 36
          = 40
    AC = 2 root 10

Perimeter = 8 + 6 root 2 + 2 root 10
                 = 2 (4 + 3 root 2 + root 10) units
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So the first thing you want to do is look at the exterior angle 130°. A straight line is 180°, and every Triangle's angular sum is 180°. How I think of it is that every straight line has a mini protractor on either side. It makes it a bit easier to understand.

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3 0
3 years ago
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kakasveta [241]

Answer:

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