Space geometry

1103188902

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

2010005001

Level: 
A
Determine whether two lines $a$ and $b$ are identical, parallel, intersecting or skew. \[\begin{aligned} a\colon x & = 3 -2m, & & \\y & = 4 - 3m, & & \\z & = 4+m;\ m\in \mathbb{R} & & \end{aligned}\] \[\begin{aligned} b\colon x & = - n, & & \\y & = -5, & & \\z & = 4-3n;\ n\in \mathbb{R} & & \end{aligned}\]
skew lines
identical lines
intersecting lines
parallel lines, not identical

2010005002

Level: 
A
Find the intersection of the line \(KL\) and the line \(q\), where \(K = [1;3;5]\), \(L = [3;-2;4]\) and \[ \begin{aligned}q\colon x& = 1 + r, & \\y & = 5 - 2r, \\z & = 3 - r;\ r\in \mathbb{R}. \\ \end{aligned} \]
\([-3;13;7]\)
\([5;-7;3]\)
\([5;-3;-1]\)
There is no intersection.

2010005003

Level: 
A
Find all the values of the real parameter \(p\) so that the lines \(a\) and \(b\) are skew lines. \[ \begin{aligned}a\colon x& =- 1 + 2m, & \\y & = 1 - pm, \\z & = 2 - m;\ m\in \mathbb{R} \\ \end{aligned}\qquad \qquad \begin{aligned}b\colon x& = 3+2n, & \\y & = 1-n, \\z & = 5+4n;\ n\in \mathbb{R} \\ \end{aligned} \]
\(p\in\mathbb{R}\setminus\{-1\}\)
\(p = -1\)
No solution exists.
The lines are skew for every real \(p\).

2010005008

Level: 
A
Determine whether the following planes \(\alpha \) and \(\beta\) are parallel, identical or intersecting. \[ \begin{aligned}[t] \alpha \colon &x = 1-m+2n, & \\&y =2m-n, \\&z = 2-m+n;\ m,n\in \mathbb{R}, \\ \end{aligned}\qquad \beta \colon x-y-3z+5 = 0 \]
identical
intersecting
parallel, not identical

2010008901

Level: 
A
Given points \( K=[-3;1;5] \) and \( L=[1;-5;4] \), determine which of the following parametric equations does not define the ray \( KL \).
$\begin{aligned} \mapsto KL\colon x&=-3+4t, \\ y&=1-6t, \\ z&=5-t;\ t\in(-\infty;0] \end{aligned}$
$\begin{aligned} \mapsto KL\colon x&=-3+4t, \\ y&=1-6t, \\ z&=5-t;\ t\in [ 0;\infty) \end{aligned}$
$\begin{aligned} \mapsto KL\colon x&=-3-8t, \\ y&=1+12t, \\ z&=5+2t;\ t\in(-\infty;0] \end{aligned}$
$\begin{aligned} \mapsto KL\colon x&=-3+8t, \\ y&=1-12t, \\ z&=5-2t;\ t\in [ 0;\infty) \end{aligned}$

2010008902

Level: 
A
Given points \( A=[-2;5;1] \) and \( B=[3;-1;2] \), determine which of the following parametric equations defines the ray \( AB \).
$\begin{aligned} \mapsto AB\colon x&=3+5t, \\ y&=-1-6t, \\ z&=2+t;\ t\in [ -1;\infty) \end{aligned}$
$\begin{aligned} \mapsto AB\colon x&=-2+5t, \\ y&=5-6t, \\ z&=1+t;\ t\in(-\infty;1] \end{aligned}$
$\begin{aligned} \mapsto AB\colon x&=3-5t, \\ y&=-1+6t, \\ z&=2-t;\ t\in(-\infty;0] \end{aligned}$
$\begin{aligned} \mapsto AB\colon x&=-2-5t, \\ y&=5+6t, \\ z&=1-t;\ t\in [ 0;\infty) \end{aligned}$

2010008903

Level: 
A
Given points \( P=[3;-4;1] \) and \( Q=[-1;3;6] \), determine which of the following parametric equations defines the ray \( QP\).
$\begin{aligned} \mapsto QP\colon x&=-1-4t, \\ y&=3+7t, \\ z&=6+5t;\ t\in (-\infty;0] \end{aligned}$
$\begin{aligned} \mapsto QP\colon x&=3-4t, \\ y&=-4+7t, \\ z&=1+5t;\ t\in[ -1;\infty) \end{aligned}$
$\begin{aligned} \mapsto QP\colon x&=3+4t, \\ y&=-4-7t, \\ z&=1-5t;\ t\in[ 0;\infty) \end{aligned}$
$\begin{aligned} \mapsto QP\colon x&=-1+4t, \\ y&=3-7t, \\ z&=6-5t;\ t\in (-\infty;1] \end{aligned}$

2010008904

Level: 
A
We are given points \( K=[4;0;3] \), \( L=[1;-3;2] \) and \( M=[2;2;0] \). From the following list, choose the parametric equations which represent a plane \( \sigma \) defined by the points \( K \), \( L \), and \( M \).
$\begin{aligned} \sigma\colon x&=1+3r+s, \\ y&=-3+3r+5s, \\ z&=2+r-2s;\ r,s\in\mathbb{R} \end{aligned}$
$\begin{aligned} \sigma\colon x&=1-3r-s, \\ y&=-3+3r-5s, \\ z&=2+r+2s;\ r,s\in\mathbb{R} \end{aligned}$
$\begin{aligned} \sigma\colon x&=1-3r+s, \\ y&=-3-3r+5s, \\ z&=2+r-2s;\ r,s\in\mathbb{R} \end{aligned}$
$\begin{aligned} \sigma\colon x&=1+3r+s, \\ y&=-3+3r-5s, \\ z&=2-r+2s;\ r,s\in\mathbb{R} \end{aligned}$