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dolphi86 [110]
3 years ago
10

Find the perimeter of △ABC with vertices A(−4, 3), B(1, −5), and C(−4, −5). Round your answer to the nearest hundredth.

Mathematics
1 answer:
miss Akunina [59]3 years ago
8 0
Let's use the distance formula: \sqrt{ (x_{1} - x_{2})^{2} + (y_{1} - y_{2})^{2}

So it is:

AB : \sqrt{(-5)^2 + 8^2} = 9.43
BC: \sqrt{5^2 + 0^2 } = 5
CA: \sqrt{0^2 + 8^2} = 8

So 9.43 + 5 + 8 =22.43
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