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9-12 Integrated Math 1 Unit 5 Lesson 2

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Unit 5, Lesson 2

Transformations as Functions

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Integrated Math 1

Practice

Problem 1

Match each coordinate rule to a description of its resulting transformation.

\((x,y) \rightarrow (x+3,y)\)
\((x,y) \rightarrow (2x,2y)\)
\((x,y) \rightarrow (x,y+4)\)
\((x,y) \rightarrow (x,y-4)\)

\((x,y) \rightarrow (x-3,y+4)\)

Translate by the directed line segment from \((0,0)\) to \((0,4)\).
Translate by the directed line segment from \((0,0)\) to \((3,0)\).
Dilate using the origin as the center and a scale factor of 2.
Translate by the directed line segment from \((0,0)\) to \((0,\text-4)\).
Translate by the directed line segment from \((0,0)\) to \((\text-3,4)\).

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Problem 2

Draw the image of triangle \(ABC\) under the transformation \((x,y) \rightarrow (x-4,y+1)\). Label the result \(T\).
Draw the image of triangle \(ABC\) under the transformation \((x,y) \rightarrow (\text- x,y)\). Label the result \(R\).

<p>Triangle ABC. A at 2 comma 3, B at 4 comma 2, C at 3 comma 5.</p>

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Problem 3

Here are some transformation rules. For each rule, describe whether the transformation is a rigid motion, a dilation, or neither.

\((x,y) \rightarrow (x-2,y-3)\)
\((x,y) \rightarrow (2x,3y)\)
\((x,y) \rightarrow (3x,3y)\)
\((x,y) \rightarrow (2-x,y)\)

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Problem 4

ForLesson 1: Rigid Transformations in a Plane

Reflect triangle \(ABC\) over the line \(x=0\). Call this new triangle \(A’B’C’\). Then reflect triangle \(A’B’C’\) over the line \(y=0\). Call the resulting triangle \(A''B''C''\).

Which single transformation takes \(ABC\) to \(A''B''C''\)?

<p>Triangle ABC graphed on coordinate plane. A at 1 comma 1, B at 2 comma -1, C at 3 comma 0.</p>

Translate triangle \(ABC\) by the directed line segment from \((1,1)\) to \((\text-2,1)\).
Reflect triangle \(ABC\) across the line \(y=\text-x\).
Rotate triangle \(ABC\) counterclockwise using the origin as the center by 180 degrees.
Dilate triangle \(ABC\) using the origin as the center and a scale factor of 2.

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Problem 5

ForLesson 1: Rigid Transformations in a Plane

Reflect triangle \(ABC\) over the line \(y=2\).

Translate the image by the directed line segment from \((0,0)\) to \((3,2)\).

What are the coordinates of the vertices in the final image?

<p>triangle ABC graphed. A = -5 comma 2, B = -6 comma -1, C = -3 comma 0.</p>

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Problem 6

ForLesson 1: Congruent Parts, Part 1

Reflect square \(ABCD\) across line \(CD\). What is the ratio of the length of segment \(AA'\) to the length of segment \(AD\)? Explain or show your reasoning.

<p>Square ABCD.</p>

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Lesson 2 Resources

Student Materials Student Materials in Spanish