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# MA.6.G.4.1

Understand the concept of Pi, know common estimates of Pi (3.14; 22/7) and use these values to estimate and calculate the circumference and the area of circles.
Subject Area: X-Mathematics (former standards - 2008)
Body of Knowledge: Geometry
Supporting Idea: Geometry and Measurement - Geometry and Measurement
Date of Last Rating: 06/07
Status: State Board Approved
Assessed: Yes

### Remarks/Examples

Using various circular objects, students determine that the ratio of circumference to diameter approximates the value of Pi.

### TEST ITEM SPECIFICATIONS

• Reporting Category: Geometry and Measurement
• Item Type(s): This benchmark will be assessed using: MC item(s)
Also assesses MA.6.A.3.4 Solve problems given a formula.
• Clarification :
Students will use 22/7 or 3.14 as an approximation for to determine the approximate circumference and area of circles.

Students will find the diameter or radius, given the circumference or area of a circle.

• Content Limits :
Items may include using vocabulary such as radius, diameter, and center.

Item graphics or options may include the use of visual representations or vocabulary associated with a circle, such as chord, arc, sector, and central angle. These terms will not be directly assessed.
• Stimulus Attributes :
Items may be set in a real-world or mathematical context.

Graphics should be used in most of these items, as appropriate.
• Response Attributes :
Multiple-choice responses should include only correct units (e.g., answers for area questions should all have square units).

### SAMPLE TEST ITEMS (1)

• Test Item #: Sample Item 1
• Question: In a regulation wrestling match, wrestlers compete within a circular zone 9 meters in diameter.

Which of the following is closest to the area of the circular zone?

• Difficulty: N/A
• Type: MC: Multiple Choice