GRADE 7 MATHEMATICS (7.7) Geometry and spatial reasoning. The student uses coordinate geometry to describe location on a plane. (B) graph reflections across the horizontal or vertical axis and graph translations on a coordinate plane.
The student is expected to:
ΔABC is graphed below and is to be translated.
If A is translated to A' (–2, 1) what would be the coordinates of B' and C'? B' (
,
)
C' (
,
)
Describe the translation in words. y 9 8 7
C
6 5 4 3
A
2 1
-9 -8
-7 -6 -5 -4 -3
-2
-1
. 0
1
2
3
4
5
6
7
8
9
x
-1 -2 -3
B
-4 -5 -6 -7 -8 -9
1. What mathematical concepts and vocabulary do I need to know to be able to work this problem?
2. Will the Grade 7 Mathematics Formula Chart be helpful on this problem? Why or why not?
3. Will a picture or diagram be helpful on this problem? If so, how?
4. What problem-solving strategy or strategies will I use to help solve this problem?
5. Extension (7.7B): If ABC is to be translated so that it is contained entirely in Quadrant I, what is the least movement that will accomplish this task? TEKSING TOWARD TAKS © 2006
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