A.\(\frac{{3a}}{4}\)
B.\(\frac{a}{2}\)
C.\(\frac{{a\sqrt 3 }}{4}\)
D.\(\frac{a}{4}\)

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

A.\({d_1}:\,\,\frac{{x - 1}}{2} = \frac{{y - 2}}{{ - 1}} = \frac{{z + 1}}{3}\)
B.\({d_2}:\,\,\frac{{x - 1}}{2} = \frac{{y + 2}}{{ - 3}} = \frac{{z - 1}}{1}\)
C.\({d_3}:\,\,\frac{{x + 1}}{2} = \frac{{y + 2}}{1} = \frac{{z - 1}}{3}\) 
D.\({d_4}:\,\,\frac{{x - 1}}{2} = \frac{{y + 2}}{3} = \frac{{z + 1}}{{ - 1}}\)

A.\(3\)
B.\(5\)
C.\(1\)
D.\(2\)

A.\(\frac{{1024\pi }}{{35}}\)
B.\(\frac{{4069}}{{35}}\)
C.\(\frac{{5017\pi }}{{35}}\)
D.\(\frac{{4096\pi }}{{35}}\)

A.\(\frac{{\pi {a^2}}}{2}\)
B.\(4\pi {a^2}\)
C.\(8\pi {a^2}\)
D.\(2\pi {a^2}\)

A.\(\overline z  = \frac{{13}}{5} + \frac{4}{5}i\)
B.\(\overline z  = \frac{{13}}{5} - \frac{4}{5}i\)
C.\(\overline z  =  - \frac{{13}}{5} + \frac{4}{5}i\)
D.\(\overline z  =  - \frac{{13}}{5} - \frac{4}{5}i\)

A.7,15cm
B.7,25cm
C.7,85cm
D.8,15cm

A.\(\frac{{32}}{{99}}\)
B.\(\frac{{224}}{{99}}\)
C.\(\frac{{32}}{{33}}\)
D.\(\frac{{224}}{{297}}\)

A.2 giờ 6 phút
B.2 giờ 10 phút
C.3 giờ 6 phút
D.3 giờ 10 phút