Question

Formula to find the perimeter of a triangle using vectors

Answer 1

Answer:

Step-by-step explanation:

The vectors given are positions of the triangle's vertices. Vector

a⃗ =3i−2j+5k

represents a vertex A whose coordinates are (3,−2,5).

Use

distance=(Δx)2+(Δy)2+(Δz)2−−−−−−−−−−−−−−−−−−√

for each pair of vertices to calculate the triangle sides' lengths, then add them to obtain a perimeter.

Once you know the sides, use the law of cosines to calculate angles.

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