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9-12 Integrated Math 1 Unit 2 Lesson 1

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K-5 Math 6-8 Math •9-12 Math

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•Integrated Math 1 Integrated Math 2 Integrated Math 3

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

Modeling Prompts

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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

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Integrated Math 1
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Unit 1
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Unit 4
Unit 5
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Unit 7
Unit 8
Unit 9

Modeling Prompts

Lesson 1
Lesson 2
Lesson 3
Lesson 4
Lesson 5
Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 11

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Unit 2, Lesson 1

Congruent Parts, Part 1

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Integrated Math 1

Practice

Problem 1

Student Task Statement

When rectangle is reflected across line , the image is . How do you know that segment is congruent to segment ?

<p>Rectangle ABCD is reflected across line EF creating rectangle CDEF.</p>

A rectangle has 2 pairs of parallel sides.
Any 2 sides of a rectangle are congruent.
Congruent parts of congruent figures are corresponding.
Corresponding parts of congruent figures are congruent.

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Problem 2

Student Task Statement

Triangle is the image of isosceles triangle after a reflection across line . Select all the statements that are a result of corresponding parts of congruent triangles being congruent.

<p>Triangle FGH is the image of isosceles triangle FEH after a reflection across line HF.</p>

is a rectangle.

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Problem 3

Student Task Statement

Reflect right triangle across line . Classify triangle according to its side lengths. Explain how you know.

<p>Triangle A B C. Angle B is a right angle.</p>

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Problem 4

ForLesson 18: Practicing Point-by-Point Transformations

Student Task Statement

Identify a figure that is the result of a rigid transformation of quadrilateral .
Describe a rigid transformation that would take to that figure.

<p>6 quadrilaterals.</p>

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Problem 5

ForLesson 17: Working with Rigid Transformations

Student Task Statement

Triangle is congruent to triangle . Describe a sequence of rigid motions that takes to , to , and to .

<p>Two congruent triangles labeled A prime B prime C prime and ABC.</p>

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Lesson 1 Resources

Student Materials Student Materials in Spanish

has 4 congruent sides.

Diagonal bisects angles and .

Diagonal is perpendicular to side .

Angle is congruent to angle .