Polygon problem involving vectors

[Sjein]

Are my answers right? Can you explain why?

 

[Deleted member 4993]

View attachment 20464
Are my answers right? Can you explain why?

How come you don't know how you did get those answers? Did you get those answers from "some body else"?

Do you know the "law of polygon" for vector addition?

 

[Sjein]

View attachment 20467How come you don't know how you did get those answers? Did you get those answers from "some body else"?

Do you know the "law of polygon" for vector addition?

I solved the problem by myself by assuming that some sides are parallel

 

[Deleted member 4993]

I solved the problem by myself by assuming that some sides are parallel

Please share your work/reasoning.

 

[Sjein]

 

[Sjein]

After that I used vector addition rule and got my answers

 

[Deleted member 4993]

View attachment 20487

Good work!

BG = (c-b) - (b-a) = c - 2b + a

OG = OB + BG = c - 2b + a + b = a - b + c ...........................................correct

CD = CG + GD = -(b-a) + (c-b) = a - 2b + c .........................................correct

 

[Sjein]

Good work!

BG = (c-b) - (b-a) = c - 2b + a

OG = OB + BG = c - 2b + a + b = a - b + c ...........................................correct

CD = CG + GD = -(b-a) + (c-b) = a - 2b + c .........................................correct

So my assumptions were right? Thanks for checking my work