#Vectors Question

22 messages · Page 1 of 1 (latest)

viral niche
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Can someone please solve this and either send me the step solution or explain me how you did it

dusty abyssBOT
viral niche
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This is the answer

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Sorry for the quality

hallow night
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We note that $$\vec{AF}+\vec{AC}=\vec{AB}+\vec{AE}=\vec{AD}$$
As such
$$\vec{AF}+\vec{AC}+\vec{AB}+\vec{AE}+\vec{AD} = 3\vec{AD}$$
$||\vec{AD}||=2$ since $ABCDEF$ is a regular hexagon with unit (1) side lengths, which can be divided into 6 congruent equilateral triangles. So
$3\vec{AD}$ has magnitude 6 and direction $\vec{AD}$, note that the angle between $\vec{AB}$ and $\vec{AD}$ is $60^{\circ}$.

dusty fieldBOT
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Crystopher

viral niche
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Then the answer AB is wrong then right?

hallow night
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not really, it says $60^{\circ}$ to $\vec{AB}$

dusty fieldBOT
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Crystopher

hallow night
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which is in other words the direction of $\vec{AD}$

dusty fieldBOT
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Crystopher

hallow night
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So the answer is correct, although it could be expressed in a simpler way.

viral niche
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How do you know if the angle is 60 degrees?

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Since only the corners of the hexagon are 60 degrees

hallow night
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the triangle marked is equilateral

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all of its angles are $60^{\circ}$

dusty fieldBOT
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Crystopher

hallow night
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So this angle is $60^{\circ}$

dusty fieldBOT
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Crystopher

hallow night
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this image describes it in better quality

viral niche
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OOOHH my bad I thought that the corners are 60 but their all 120 sorry