If `overline (AB)|\|overline (DC)` and `overline (CD)|\|overline (EF)` then how are `overline (AB)`, `overline (EF)`?

If overline (AB) bot overline (BC) and overline (BC) bot overline (CD) , then how are overline (AB) , overline (CD) ?

Measure all the line segments in the figure given below and arrange them in the ascending order of their lengths. Line segments overline(AB) , overline(AC) , overline(AD) , overline(AE) , overline(BC) , overline(BD) , overline(BE) , overline(CD) , overline(CE) , overline(DE)

For three vectors overline(p),overline(q) and overline ( r) , if overline( r) =3 overline(p)+4overline(q) and 2 overline( r) = overline(p) - 3overline(q) then

If overline(a)=2overline(i) +3 overline(j)-5overline(k),overline(b) =m overline(i)+noverline(j)+12overline(k) and overline(a)xxoverline(b)=overline(0) then (m,n)= .

Fill in the blanks: If overline (AB) = 7 cms and C is the midpoint of overline (AB) , then the relation between overline (AB) , overline (Ac) , is _____________

If |overline(a)|=3,|overline(b)|=4 and the angle between overline(a) and overline (b) is 120^@ , then |4overline(a)+3overline(b)| is equal to

If overline(a),overline(b),overline( c) are non-zero vectors such that (overline(a)xxoverline(b))xxoverline( c) =(1)/(3)|overline(b)||overline( c) |overline(a), overline( c) ⊥ and theta is the angle between the vectors overline(b) , overline( c) then sin theta= .