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9-12 Integrated Math 2 Unit 3 Lesson 12

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K-5 Math 6-8 Math •9-12 Math

Course

Integrated Math 1 •Integrated Math 2 Integrated Math 3

Unit

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

Modeling Prompts

Lesson

Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 •Lesson 12

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9-12

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Integrated Math 2
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Algebra 1
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Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8

Modeling Prompts

Lesson 1
Lesson 2
Lesson 3
Lesson 4
Lesson 5
Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 11
Lesson 12

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Unit 3, Lesson 12

Approximating Pi

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Integrated Math 2

Practice

Problem 1
Student Task Statement
Technology required. A regular pentagon has side length 7 inches.

What is the perimeter of the pentagon?

What is the area of the pentagon?
to access Practice Problem Solutions.

Problem 2

Student Task Statement

Technology required. The expression approximates by giving the perimeter of a regular polygon inscribed in a circle with radius 1.

What does stand for in the expression?
If there are 60 sides, what is the difference between the perimeter and

to access Practice Problem Solutions.

Problem 3

ForLesson 11: Solving Problems with Trigonometry

Student Task Statement

Technology required. A regular hexagon has side length 2 inches.

What is the perimeter of the hexagon?
What is the area of the hexagon?

to access Practice Problem Solutions.

Problem 4

ForLesson 11: Solving Problems with Trigonometry

Student Task Statement

An airplane travels 125 miles horizontally while it descends 9 miles vertically.

What is the angle of descent?
What is the distance of the plane’s path?

to access Practice Problem Solutions.

Problem 5

ForLesson 10: Using Trigonometric Ratios to Find Angles

Student Task Statement

Select all true statements.

<p>Right triangle A B C. Side A B is 5 units, B C is 12. Angle B A C labeled alpha, angle A C B labeled theta.</p>

units
units

to access Practice Problem Solutions.

Problem 6

ForLesson 8: Sine and Cosine in the Same Right Triangle

Student Task Statement

Write 2 equations using sine and 2 equations using cosine based on triangle .

<p>Right triangle ABC. Angle C = 90 degrees. Angle B = 66 degrees. Angle A = 24 degrees. AB = 7. BC = y. AC = x.</p>

to access Practice Problem Solutions.

Problem 7

ForLesson 3: Half an Equilateral Triangle

Student Task Statement

An equilateral triangle has area of square units. What is the side length?

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Lesson 12 Resources

Student Materials