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6-8 Accelerated 7 Unit 2 Lesson 2

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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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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 Lesson 14 Lesson 15 Lesson 16 Lesson 17 Lesson 18 Lesson 19

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Accelerated 7

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Curriculum

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

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Unit 2, Lesson 2

Scale Factors and Making Scaled Copies

Accelerated 7

Practice

Problem 1

Polygon B is a scaled copy of Polygon A.

What is the scale factor from Polygon A to Polygon B? Explain your reasoning.
Find the missing length of each side marked with a "?" in Polygon B.
Determine the measure of each angle marked with a "?" in Polygon A.

2 pentagons, labeled A and B.

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Lesson 2 Resources

Student Materials

Problem 2

Here are 3 polygons.

Three polygons labeled A, B, and C.

Draw a scaled copy of Polygon A using a scale factor of 2.

Draw a scaled copy of Polygon B using a scale factor of \(\frac{1}{2}\).

Draw a scaled copy of Polygon C using a scale factor of \(\frac{3}{2}\).

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Problem 3

Draw a scaled copy of this polygon so that the scaled copy has a perimeter of 30 units.

An L shaped figure on a square grid. The polygon is composed of two shapes: a rectangle adjoined with a square so that the bottom horizontal base of the polygon is 2 units. The rectangle is 1 unit wide and 3 units in length. The square is 1 unit wide and 1 unit in length.
What is the scale factor? Explain how you know.

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Problem 4

ForLesson 1: What Are Scaled Copies?

Priya and Tyler are discussing the figures.

Priya says B, C, and D are scaled copies of A.
Tyler says B and D are scaled copies of A.

Do you agree with either of them? Explain your reasoning.

Four shapes that look like plus signs labeled A,B,C,D on a grid.

to access Practice Problem Solutions.