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#### Description:

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Suppose we define $\pi$ to be the circumference of a circle whose diameter is 1: Explain why the circumference of a circle with radius $r \gt 0$ is \$2\...

#### Subjects:

• Mathematics > General
• Education > General

#### Keywords:

Informal Education,Vocational/Professional Development Education,NSDL,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-103,High School,oai:nsdl.org:2200/20131110173612806T,Mathematics,Education

English

#### Access Privileges:

Public - Available to anyone

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#### Collections:

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Update Standards?

#### CCSS.Math.Content.HSG-GMD.A.1: Common Core State Standards for Mathematics

Give an informal argument for the formulas for the circumference of a circle, area of a circle, volume of a cylinder, pyramid, and cone.
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