Understand Triangle Law of Vector Addition

We are just trying to understand basic concept while keeping things simple. These can be applied in any situation, provided their constraints are well understood. Examples:

[chandangamer]

thank u very much sir
I understood in Just minutes

[shabnamnaaz]

sir thanku so much you are a great teacher

[kuramayya]

Sir why we not keep arrow in downward direction resultant vector

[sheikibrahim]

what if you get a equlateral triangule ? how would you find it then

[radhikakella]

Can we think both vectors a and b as collinear vectors

[shobharamchandani]

It means there is no difference between head to tail rule and triangle law.. is it so???

[shreyashgadute]

can we numerically add vectors using this law?

[akashranjan]

U show only geometrical method what about analytical method for calculating the resultant vectors