Question

Help Pre-algebra

Answer 1

Look at point A and point A'
If you start at point A, how many units in x and in which direction do you go to get to A' ?

Answer 2

hmm

Answer 3

-3

Answer 4

over 1 down 3

Answer 5

Can you read the x-coordinate of point A? Notice that each square represents two units, not one (both in x and y).

Answer 6

6,2

Answer 7

didn't see that sorry

Answer 8

Point A is one square two the right and one square up from (0, 0), right?

Answer 9

Point A is very close to point B'

Answer 10

Point A is the upper point of the lower triangle.

Answer 11

You're confusing me here

Answer 12

Point a on the triangle ABOVE the x axis point A is 7 units up

Answer 13

the other triangle is 2 units

Answer 14

First you need to be careful with the terms used in this problem.
There are two triangles. Each has 3 vertices.
Ok so far?

Answer 15

Yes

Answer 16

Now there is a lower triangle and an upper triangle.
The vertices of the lower triangle are called simply the letters A, B and C.
When I asked for coordinates of A, I mean in the lower triangle.

Answer 17

ok
Than that is x = 2, Y = 2

Answer 18

The coordinates of the upper triangle are called A', B', and C'
The appostrophe after each letter is called "prime" in math.
The upper triangle has vertices "A prime", "B prime", and "C prime"

Answer 19

Now you got it.

Answer 20

alright just a lil switch there, I got it so far now.

Answer 21

Now that you know point A in the lower triangle has coordinates (2, 2), now give me the coordinates of point A' (called "A prime") which is the upper vertex of the upper triangle.

Answer 22

y = 7

Answer 23

A(2, 2) became A'( ?, 7)
What is the value of the x coordinate of A' ?

Answer 24

0

Answer 25

Exactly.

Answer 26

Now we can write:
A(2, 2) became A'(0, 7)
Right?

Answer 27

I suppose, yea

Answer 28

Point A with coordinates (2, 2) became point A' with coordinates (0, 7)
That was the transformation.

Answer 29

ok

Answer 30

Now look at the x-value of A and the x-value of A'
It went from 2 to 0. That means it became 2 less than is was. That means a transformation of -2 in x

Answer 31

-2, 5 ?

Answer 32

Now look at the y-coordinates of A and A'
It went from 2 to 7. That is 5 more, or +5

Answer 33

Right

Answer 34

the answer is B ?

Answer 35

Notice that all other vertices also went 2 left in x and 5 up in y.
The transformation is x - 2, y + 5

Answer 36

Correct. Good work.

Answer 37

ty buddy I got another one if you want to help

Answer 38

yw

Answer 39

Do you know what skew lines are?

Answer 40

not really lol isn't it like parallel lines or something like that?

Answer 41

like for example FE ?

Answer 42

Since this is a question about skew lines, you need to know what they are.

Answer 43

Do you know what parallel lines are?

Answer 44

Yes

Answer 45

Let's say the drawing above shows a dining room table.

Answer 46

The top of the table is plane. A plane is a flat surface that extends infinitely.

Answer 47

I called the table top plane p.
On plane p, I drew two lines which I called m and n.

Answer 48

Lines m and n lie on the same plane, plane p, and do not intersect. They are parallel lines.

Answer 49

The above statement is the basic definition of parallel lines.
Parallel lines are lines that lie in the same plane and do not intersect.

Answer 50

Part of the definition of parallel lines is that "the lines lie in the same plane."

Answer 51

Skew lines also do not intersect.

Answer 52

What is the difference between parallel lines and skew lines?
Skew lines do not lie in the same plane.

Answer 53

ok

Answer 54

The similarity between skew lines and parallel lines is the both skew lines and parallel lines do not intersect.

Answer 55

So DE is right ?

Answer 56

Correct.

Answer 57

ty

Answer 58

DE is the only correct choice bec DE and BA are skew lines.
All other choices are parallel to BA, not skew.

Answer 59

wlcm