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6-8 Grade 8 Unit 2 Lesson 3

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K-5 Math •6-8 Math 9-12 Math

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Grade 6 Grade 7 •Grade 8

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Unit 1 •Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8 Unit 9

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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

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Accelerated 7

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Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9

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

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Unit 2, Lesson 3

Dilations with No Grid

Grade 8

Practice

Problem 1
Student Task Statement
Segment measures 3 cm. Point is the center of dilation. How long is the image of after a dilation with:

Scale factor 5?

Scale factor 3.7?

Scale factor ?

Scale factor ?

Lesson 3 Resources

Student Materials

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Problem 2

Student Task Statement

Here are points and . Plot the points for each dilation described.

Points A and B

is the image of using as the center of dilation and a scale factor of 2.
is the image of using as the center of dilation and a scale factor of 2.
is the image of using as the center of dilation and a scale factor of .
is the image of using as the center of dilation and a scale factor of .

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Problem 3

Student Task Statement

Make a perspective drawing. Include in your work the center of dilation, the shape you dilate, and the scale factor you use.

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Problem 4

ForLesson 1: Projecting and Scaling

Student Task Statement

Triangle and triangle are scaled copies. Side measures 12 cm and is the longest side of . Side measures 8 cm and is the longest side of .

Triangle is a scaled copy of triangle with what scale factor?
Triangle is a scaled copy of triangle with what scale factor?

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Problem 5

ForLesson 14: Alternate Interior Angles

Student Task Statement

The diagram shows two intersecting lines.

Find the missing angle measures.

Two intersecting lines, forming an X.

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Problem 6

ForLesson 12: Congruent Polygons

Student Task Statement

Here are 2 triangles.

Two triangles in an x y plane.

Show that the 2 triangles are congruent.
Find the side lengths of triangle and the angle measures of triangle .

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