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6-8 Accelerated 7 Unit 1 Lesson 5

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K-5 Math •6-8 Math 9-12 Math

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Accelerated 6 •Accelerated 7

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Lesson 1 Lesson 2 Lesson 3 Lesson 4 •Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 Lesson 15 Lesson 16 Lesson 17 Lesson 18

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IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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Unit 1, Lesson 5

Describing Transformations

Accelerated 7

Practice

Problem 1

Student Task Statement

Here is Polygon A in the coordinate plane:

Trapezoid A on a coordinate plane, origin O. Horizontal and vertical axis scale negative 5 to 5 by 1’s. Trapezoid A has coordinates (2 comma 1), (2 comma 3), (4 comma 4) and (4 comma 1).

Draw Polygon B, the image of A, using the -axis as the line of reflection.
Draw Polygon C, the image of B, using the -axis as the line of reflection.
Draw Polygon D, the image of C, using the -axis as the line of reflection.

Lesson 5 Resources

Student Materials Student Materials in Spanish

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Problem 2

Student Task Statement

The point is rotated counterclockwise using center . What are the coordinates of the image?

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Problem 3

Student Task Statement

Describe a sequence of transformations for which Triangle B is the image of Triangle A.

Triangle A and its image triangle B on a coordinate plane.

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Problem 4

ForLesson 2: Naming the Moves

Student Task Statement

Here is quadrilateral . Draw the image of quadrilateral after each transformation.

The translation that takes to .
The reflection over segment .
The rotation about point by angle , counterclockwise.

Quadrilateral A B C D. A B, A D and D C all have negative slopes. B C has a positive slope. A B C D has no parallel sides and no right angles.

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