A.41
B.50
C.65
D.55

A.308
B.236
C.360
D.300

A.100
B.90
C.150
D.80

A.200
B.160
C.120
D.150

A.108
B.90
C.100
D.110

A.
B.
C.
D.

A.\({120^0}\)
B.\({60^0}\)
C.\({30^0}\)  
D.\({90^0}\)

A.\(\dfrac{{\sqrt 2 {a^2}}}{3}\)
B.\(\dfrac{{2\sqrt 2 {a^2}}}{3}\)  
C.\(\dfrac{{\sqrt 2 {a^2}}}{6}\)  
D.\(\dfrac{{\sqrt 6 {a^2}}}{3}\)

A.\(\left( {1;3;0} \right)\)
B.\(\left( {1; - 3;0} \right)\)  
C.\(\left( {3;1;0} \right)\)  
D.\(\left( {2;6;0} \right)\)

A.\(\dfrac{7}{{40}}\)
B.\(\dfrac{9}{{10}}\)  
C.\(\dfrac{6}{{25}}\)  
D.\(\dfrac{{21}}{{40}}\)