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vazorg [7]
3 years ago
7

The coordinates of the verticies of triangle ABC are A(2,5), B(6,-1), and C(-4,-2). Fint the perimeter of triangle ABC, to the n

earest tenth
Mathematics
1 answer:
deff fn [24]3 years ago
8 0

Answer:

24.4 Units

Step-by-step explanation:

For this, we will use the distance formula to find the distance between each vertex

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

So we do this for each side of the triangle to get AB = \sqrt{52}, BC = \sqrt{109}, and AC = \sqrt{45}

We add these all up to get 24.4 (rounded)

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The triangle is isosceles since two of its legs coincide with the radius of the circle, and the angle between these sides measures 120°, same as the arc it subtends. If b is the length of the third side in the triangle, then by the law of cosines

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