A.\(172\)
B.\(168\)
C.\(178\)
D.\(180\)

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

A.\(\dfrac{{a\sqrt {10} }}{{40}}\)
B.\(\dfrac{{8a}}{3}\)
C.\(\dfrac{{3a}}{8}\)
D.\(\dfrac{{3a}}{2}\)

A.\(8\)
B.\(10\)
C.\(\dfrac{{32}}{3}\)
D.\(\dfrac{{28}}{3}\)

A.\(4\)
B.\(8\)
C.\(2\)
D.\(6\)

A.\(7\)
B.\(4\)
C.\(3\)
D.\(6\)

A.\(S = \dfrac{{8084}}{{11}}\)
B.\(S = \dfrac{{22231}}{4}\)
C.\(S = \dfrac{{78819}}{4}\)
D.\(S = \dfrac{{78819}}{{11}}\)

A.\(\dfrac{{7 + \sqrt {17} }}{2}\)
B.\( - \dfrac{{7 + \sqrt {17} }}{2}\)
C.\(\dfrac{{7 - \sqrt {17} }}{2}\)
D.\(\dfrac{{ - 7 + \sqrt {17} }}{2}\)

A.\(7\)
B.\(3\)
C.\(5\)
D.\(6\)

A.\(4\)
B.\(18\)
C.\(\dfrac{{14}}{3}\)
D.\(\dfrac{{10}}{3}\)