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GEO: 12-3 QC (rotations)
Contributed by: Maynard
(Original author: Dilaura)
1. A commonly used word for a rotation is...
12.3
 flip
 turn
 slide
 push
12.3
2. Tell whether the transformation appears to be a rotation.
No, this is not a rotation
Yes, this is a rotation
12.3
3. Tell whether the transformation appears to be a rotation.
No, this is not a rotation
Yes, this is a rotation
12.3
4. Tell whether the transformation appears to be a rotation.
No, this is not a rotation
Yes, this is a rotation
12.3
5. Rotating the point (x,y) 90o about the originresults in the point...
(x, y)
(-x, y) 
(y, -x)
(-y, x)
12.3
6. Rotating the point (x,y) 180o about the originresults in the point...
(x, y)
(-x, -y) 
(y, -x)
(-y, x)
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
7. Find the image coordinate of A' after a R90 aboutthe origin. 
12.3
C
B
A
A' = 
note: write coordinates
as (x,y) with NO spaces
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
8. Find the image coordinate of B' after a R90 aboutthe origin.
12.3
C
B
A
B' = 
note: write coordinates
as (x,y) with NO spaces
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
9. Find the image coordinate of C' after a R90 aboutthe origin.
12.3
B
C' = 
note: write coordinates
as (x,y) with NO spaces
A
C
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
10. Find the image coordinate of C' after a R180 aboutthe origin.
12.3
B
C' = 
note: write coordinates
as (x,y) with NO spaces
A
C
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
11. Find the image coordinate of C' after a R180 aboutthe origin.
12.3
B
A
C
C' = 
note: write coordinates
as (x,y) with NO spaces
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
12. Find the image coordinate of A' after a R180 aboutthe origin.
12.3
B
A
C
A' = 
note: write coordinates
as (x,y) with NO spaces
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
13. Find the image coordinate of A' after a R90 aboutthe origin.
12.3
B
A
C
A' = 
note: write coordinates
as (x,y) with NO spaces
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
14. Find the image coordinate of B' after a R180 aboutthe origin.
12.3
B
A
C
B' = 
note: write coordinates
as (x,y) with NO spaces
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
15. Find the image coordinate of C' after a R180 aboutthe origin.
12.3
D
A
C' = 
note: write coordinates
as (x,y) with NO spaces
B
C
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
16. Find the image coordinate of A' after a R180 aboutthe origin.
12.3
D
A
A' = 
note: write coordinates
as (x,y) with NO spaces
B
C
2
-2
4
-4
6
-6
2
-2
4
-4
6
-6
8
-8
10
-10
17. Find the image coordinate of D' after a R90 aboutthe origin.
12.3
D
A
D' = 
note: write coordinates
as (x,y) with NO spaces
B
C
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