The rule ry-axis • RO, 90°(x, y) is applied to ΔABC.
Which triangle shows the final image?
1
2
3
4
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Consider triangle ABC with vertices at points A(2,-4), B(4,-4) and C(4,-2).
1. The rotation [tex]R_{O, 90^{\circ}}(x, y)[/tex] acts with the rule:
[tex](x,y)\rightarrow (-y,x).[/tex]
Then:
2. The reflection across the y-axis has a rule:
[tex](x,y)\rightarrow (-x,y).[/tex]
So,
Triangle A''B''C'' is exactly the same as tiangle from figure 1.
Answer: correct choice is 1.
The coordinate of triangle after the rotation and reflection is A"(-4,2), B"(-4,4) and C"(-2,4). Hence the triangle 1 shows the final image.
Rotation of an object is rotating it about a fixed point without changing its shape and size.
Reflecting of an object is flipping it across a line without changing its shape and size.
Given information-
The [tex]\Delta ABC[/tex] is given in the problem.
The rule ry-axis • RO, 90°(x, y) is applied to ΔABC.
The rotation will change the y axis with the above rule.
[tex]A'=A(-y,x)\\A'=(4,2)[/tex]
[tex]B'=B(-y,x)\\B'=(4,4)[/tex]
[tex]C'=C(-y,x)\\C'=(2,4)[/tex]
The reflection across the y-axis with the above rule.
[tex]A"=A'(-x,y)\\A"=(-4,2)[/tex]
[tex]B"=B'(-x,y)\\B"=(-4,4)[/tex]
[tex]C"=C'(-x,y)\\C"=(-2,4)[/tex]
Thus the coordinate of triangle after the rotation and reflection is A"(-4,2), B"(-4,4) and C"(-2,4). Hence the triangle 1 shows the final image.
Learn more about the rotation and reflection of figure here;
https://brainly.com/question/17174293