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6-8 Grade 8 Unit 2 Lesson 4

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IM K-5 Math
IM 6-8 Math
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Unit 2, Lesson 4

Dilations on a Square Grid

Grade 8

Practice

Problem 1

Student Task Statement

Triangle is dilated using as the center of dilation with scale factor 2.

The image is triangle . Clare says the 2 triangles are congruent, because their angle measures are the same. Do you agree? Explain your reasoning.

Triangle A B C, it‘s image after dilation triangle A prime B prime C prime and point D.

Lesson 4 Resources

Student Materials Student Materials in Spanish

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Problem 2

Student Task Statement

Sketch the image of quadrilateral under the following dilations:

The dilation centered at with scale factor 2.
The dilation centered at with scale factor .
The dilation centered at with scale factor .

Quadrilateral P Q R S and point O on a square grid.

to access Practice Problem Solutions.

Problem 3

ForLesson 14: Alternate Interior Angles

Student Task Statement

The diagram shows 3 lines with some marked angle measures.

Find the missing angle measures.

Three lines in a plane.

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Problem 4

ForLesson 4: Making the Moves

Student Task Statement

Describe a sequence of translations, rotations, and reflections that takes Polygon P to Polygon Q.

Two of the same figure on a square grid in different orientations and position.

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Problem 5

ForLesson 6: Describing Transformations

Student Task Statement

Point has coordinates . After a translation 4 units down, a reflection across the -axis, and a translation 6 units up, what are the coordinates of the image?

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