# Thread: can someone check my coordinate points?

1. ## can someone check my coordinate points?

can someone check if i did these coordinates correctly cause my graph looks kinda werid

1)Graph and label triangle ABC whose vertices have coordinate A( 2,2) B(1,5) and C (5,4)

Graph triangle A' B' C' the image of triangle ABC under T -6,3
state the coordinates of A' B' C'

A(2,2) -> A'(-4,5)
B(1,5) -> B'(-5,8)
C(5,4) -> C'(-1,7)

Graph traingle A"B"C" the image of traingle ABC under r y=x
State the coordinate of A" B" C"

A(2,2) -> A"(2,2)
B(1,5) -> B"(5,1)
C(5,4) -> C"(4,5)

Graph triangle A"B"C" the image of traingle ABC under R o,90
State the coordinate of A"'B"'C"'

A(2,2) -> A"'(-2,2)
B(1,5) -> B"'(-5,1)
C(5,4) -> C"'(-4,5)

2)Graph and label triangle ABC whose vertices have coordinate A( 2,2) B(1,5) and C (5,4)

Graph triangle A' B' C' the image of triangle ABC under D2
state the coordinates of A' B' C'

A(2,2) -> A'(4,4)
B(1,5) -> B'(2,10)
C(5,4) -> C'(10,8)

Graph traingle A"B"C" the image of traingle ABC under r origin
State the coordinate of A" B" C"

A(2,2) -> A"(2,2)
B(1,5) -> B"(5,-1)
C(5,4) -> C"(4,5)

Graph triangle A"B"C" the image of traingle ABC under r x-axis
State the coordinate of A"'B"'C"'

A(2,2) -> A"'(2,-2)
B(1,5) -> B"'(1,-5)
C(5,4) -> C"'(5,-4)

2. Hello zelda1850
Originally Posted by zelda1850
can someone check if i did these coordinates correctly cause my graph looks kinda werid

1)Graph and label triangle ABC whose vertices have coordinate A( 2,2) B(1,5) and C (5,4)

Graph triangle A' B' C' the image of triangle ABC under T -6,3
state the coordinates of A' B' C'

A(2,2) -> A'(-4,5)
B(1,5) -> B'(-5,8)
C(5,4) -> C'(-1,7)

Graph traingle A"B"C" the image of traingle ABC under r y=x
State the coordinate of A" B" C"

A(2,2) -> A"(2,2)
B(1,5) -> B"(5,1)
C(5,4) -> C"(4,5)

Graph triangle A"B"C" the image of traingle ABC under R o,90
State the coordinate of A"'B"'C"'

A(2,2) -> A"'(-2,2)
B(1,5) -> B"'(-5,1)
C(5,4) -> C"'(-4,5)

2)Graph and label triangle ABC whose vertices have coordinate A( 2,2) B(1,5) and C (5,4)

Graph triangle A' B' C' the image of triangle ABC under D2
state the coordinates of A' B' C'

A(2,2) -> A'(4,4)
B(1,5) -> B'(2,10)
C(5,4) -> C'(10,8)

Graph traingle A"B"C" the image of traingle ABC under r origin
State the coordinate of A" B" C"

A(2,2) -> A"(2,2)
B(1,5) -> B"(5,-1)
C(5,4) -> C"(4,5)

Graph triangle A"B"C" the image of traingle ABC under r x-axis
State the coordinate of A"'B"'C"'

A(2,2) -> A"'(2,-2)
B(1,5) -> B"'(1,-5)
C(5,4) -> C"'(5,-4)
The notation you are using to represent each of the transformations is not one that I've used, but I can see what most of your answers represent.

1a is OK - it's a translation through -6 in the x-direction and 3 in the y-direction.

1b is OK - if r y = x represents a reflection in y = x.

1c is OK - if R o,90 means a rotation centre O, through 90 degrees anticlockwise.

I think 2a is OK - provided D2 represents an enlargement with scale factor 2, centre O. (But I don't see why the letter D is used.)

2b doesn't seem to make sense to me. What does r origin mean?

2c is OK - if r x-axis is a reflection in the x-axis.

So all your answers make sense except the second part of question 2. Do you need to look at that one again?