In Fig 66, `l in e\ l m ,\ /_1=120^0\ ` and `/_2=100^0,` find out `/_3\ a n d\ /_4.`

In Fig.70. if\ l m n\ a n d\ /_1=60^0, find /_2.

In Fig.72, If l m ,\ n p\ a n d\ /_1=85^0, find /_2.

In Fig.104, A B C D ,\ /_O A B=150^0\ a n d\ /_O C D=120^0dot Then, /_A O C= (a) ( b ) (c) (d) (e) 80^(( f )0( g ))( h ) (i) (j) (b) ( k ) (l) (m) (n) 90^(( o )0( p ))( q ) (r) (s) (c) ( d ) (e) (f) (g) 70^(( h )0( i ))( j ) (k) (l) (d) ( m ) (n) (o) (p) 100^(( q )0( r ))( s ) (t) (u)

In Fig.80, line A C l in e\ D E\ a n d\ /_A B D=32^0dot Find out the angles x\ a n d\ y\ if /_E=122^0dot

In Fig. 73, a transversal n cuts two lines l\ a n d\ mdotif\ /_1=70^0\ a n d\ /_7=80^0, is l m ?

In Fig. 74, a transversal n cuts two lines l\ a n d\ m\ such that /_2=65^0 and /_8=65^0dot Are the lines parallel?

In Fig. 64, A B||C D\ and a transversal P Q cuts them at L\ a n d\ M respectively. If /_Q M D=100^0, find all other angles.

A B C is a right-angled triangle in which /_B=90^0 and B C=adot If n points L_1, L_2, ,L_nonA B is divided in n+1 equal parts and L_1M_1, L_2M_2, ,L_n M_n are line segments parallel to B Ca n dM_1, M_2, ,M_n are on A C , then the sum of the lengths of L_1M_1, L_2M_2, ,L_n M_n is (a(n+1))/2 b. (a(n-1))/2 c. (a n)/2 d. none of these

Describe the orbital with the following quantum numbers : (i) n = 1, l = 0 " " (ii) n = 2, l = 1, m = 0 (iii) n = 3, l = 2 " " (iv) n = 4, l = 1 (v) n = 3, l = 0, m = 0 " " (vi) n = 3, l = 1 .

Using the s,p, d notation , deseribe the orbit with the following number a n = 1, l = 0 b. n = 2, l = 0 c. n = 3, l = 3 d. n = 4, l = 2 e. n = 4, l = 3