Space geometry

1103188902

Level: 
A
Assign the planes shown in the picture to the corresponding general equations.
\( \alpha\colon y-2=0;\ \beta\colon z-2=0;\ \gamma\colon x-2=0 \)
\( \alpha\colon y+2=0;\ \beta\colon z+2=0;\ \gamma\colon x+2=0 \)
\( \alpha\colon x+z-2=0;\ \beta\colon x+y-2=0;\ \gamma\colon y+z-2=0 \)
\( \alpha\colon x-y+z-2=0;\ \beta\colon x+y-z-2=0;\ \gamma\colon -x+y+z-2=0 \)

1103212206

Level: 
C
A cube \( ABCDEFGH \) with an edge length of \( 2 \) is placed in a coordinate system (see the picture). Let \( p \) be a line of intersection of planes \( \alpha \) and \( \beta \), where \( \alpha \) is passing through \( C \), \( F \) and \( H \) and \( \beta \) is passing through \( A \), \( F \) and \( H \). Find the parametric equations of the line \( p \) and calculate the angle \( \varphi \) between planes \( \alpha \) and \( \beta \) . Round \( \varphi \) to the nearest minute.
\( \begin{aligned} p\colon x&=t, & \varphi&\doteq 70^{\circ}32' \\ y&=t, & &\\ z&=2;\ t\in\mathbb{R}, & & \end{aligned} \)
\( \begin{aligned} p\colon x&=2t, & \varphi&\doteq 90^{\circ} \\ y&=2t, & & \\ z&=2+2t;\ t\in\mathbb{R}, & & \end{aligned} \)
\( \begin{aligned} p\colon x&=t, & \varphi&\doteq 90^{\circ}\\ y&=t, & & \\ z&=2;\ t\in\mathbb{R}, & & \end{aligned} \)
\( \begin{aligned} p\colon x&=2t, & \varphi&\doteq 70^{\circ}32' \\ y&=2t, & & \\ z&=2t;\ t\in\mathbb{R}, & & \end{aligned} \)

1103212205

Level: 
C
A cube \( ABCDEFGH \) with an edge length of \( 2 \) is placed in a coordinate system (see the picture). Find the distance between parallel planes \( \alpha \) and \( \beta \), where \( \alpha \) is passing through \( B \), \( D \) and \( G \) and \( \beta \) is passing through \( A \), \( F \) and \( H \).
\( |\alpha\beta|=\frac{2\sqrt3}3 \)
\( |\alpha\beta|=\frac{4\sqrt3}3 \)
\( |\alpha\beta|=\frac{3\sqrt3}2 \)
\( |\alpha\beta|=\frac{3\sqrt3}4 \)

1103212204

Level: 
C
A cube \( ABCDEFGH \) with an edge length of \( 2 \) is placed in a coordinate system (see the picture). Let the point \( M \) be the centre of the edge \( EF \). Find the general form equation of the plane \( \rho \) passing through the points \( B \), \( D \), and \( G \) and calculate the distance of \( M \) from the plane \( \rho \).
\( \rho\colon x-y+z=0;\ |M\rho|=\sqrt3 \)
\( \rho\colon x-y+z+2=0;\ |M\rho|=\sqrt3 \)
\( \rho\colon x-y+z+2=0;\ |M\rho|=2\sqrt3 \)
\( \rho\colon x-y+z=0;\ |M\rho|=2\sqrt3 \)

1103212202

Level: 
C
A straight line \( p \) is given by the points \( M=[4;3;2] \) and \( N=[0;6;7] \) (see the picture). Find the parametric equations of the line \( p' \) that is symmetrical to the line \( p \) in the plane symmetry across the coordinate \( yz \)-plane.
\( \begin{aligned} p'\colon x&=4t, \\ y&=6+3t, \\ z&=7+5t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=-4t, \\ y&=6+3t, \\ z&=7+5t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=4t, \\ y&=6-3t, \\ z&=7+5t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=-4t, \\ y&=6-3t, \\ z&=7+5t;\ t\in\mathbb{R} \end{aligned} \)

1103212203

Level: 
C
A straight line \( p \) is given by the points \( M=[4;3;2] \) and \( N=[8;0;5] \) (see the picture). Find the parametric equations of the line \( p' \) that is symmetrical to the line \( p \) in the plane symmetry across the coordinate \( xz \)-plane.
\( \begin{aligned} p'\colon x&=8+4t, \\ y&=3t, \\ z&=5+3t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=8+4t, \\ y&=0, \\ z&=5+3t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=8+4t, \\ y&=-3t, \\ z&=5+3t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=8-4t, \\ y&=3t, \\ z&=5-3t;\ t\in\mathbb{R} \end{aligned} \)

1103212201

Level: 
C
A straight line \( p \) is given by the points \( M=[4;2;0] \) and \( N=[6;6;7] \) (see the picture). Find the parametric equations of the line \( p' \) that is symmetrical to the line \( p \) in the plane symmetry across the coordinate \( xy \)-plane.
\( \begin{aligned} p'\colon x&=4+2t, \\ y&=2+4t, \\ z&=-7t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=4+6, \\ y&=2+6t, \\ z&=-7t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=4+2t, \\ y&=2+4t, \\ z&=7t;\ t\in\mathbb{R} \end{aligned} \)
\( \begin{aligned} p'\colon x&=4+6t, \\ y&=2+6t, \\ z&=7t;\ t\in\mathbb{R} \end{aligned} \)

1003124006

Level: 
A
Find the value of a parameter \( a\in\mathbb{R} \) so that the point \( D=[-2;1;1] \) lies on the straight line \( p \) defined by the parametric equations \[\begin{aligned}p\colon x&=1+m,\\ y&=-2+m,\\ z&=a+m;\ m\in\mathbb{R}. \end{aligned}\]
no such values of \(a \) exists
\( a=-1 \)
\( a=0 \)
\( a = 1\)

1003124005

Level: 
A
Find the value of a parameter \( a\in\mathbb{R} \) so that the point \( C=[2;0;6] \) lies on the straight line \( p \) defined by the parametric equations \[\begin{aligned}p\colon x&=-1+m,\\ y&=a+m,\\ z&=3+m;\ m\in\mathbb{R}.\end{aligned}\]
\( a=-3 \)
\( a=0 \)
\( a=-1 \)
no such values of \(a \) exists