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marysya [2.9K]
3 years ago
9

What is the perimeter of the triangle? Round to the nearest tenth.

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
6 0

Answer: 19.8 Units

Step-by-step explanation:

The triangle is shown in the attached figure, and have three vertices: AB, AC and BC.

Each vertice represents a point in the cartesian plane and the length of each side of the triangle is the modulus of each vector.

In this sense, the modulus m is calculated as shown:

m=\sqrt{(x_{2}-x_{1})^{2} + (y_{2}-y_{1})^{2}}

Hence, for each vector:

AB=\sqrt{(-2-3)^{2} + (3-0)^{2}}=\sqrt{34}

AC=\sqrt{(-2-(4))^{2} + (3-(-3))^{2}}=\sqrt{40}

BC=\sqrt{(-4-3)^{2} + (-3-0)^{2}}=\sqrt{58}

Now, the perimeter of a triangle is the sum of its three sides:

AB+AC+BC=\sqrt{34} + \sqrt{40} + \sqrt{58}

Finally:

AB+AC+BC=19.77 \approx 19.8

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