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Subject

Math, Science & Technology

Web-based Resource

Access this resource at: http://www.mathopenref.com/protractor.html

Description

This web page allows students to learn about protractors and how they are mathematically used.

Content Provider

Math Open Reference: http://www.mathopenref.com/

Math Open Reference encourages users to provide feedback, errors, omissions, and ideas for improvement. Please see the feedback link at the top of the page to offer your suggestions.

Related Academic Standards

New York State

NY-4.MD.5a Recognize an angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a “one-degree angle,” and can be used to measure angles.

NY-4.MD.5b Recognize an angle that turns through n one-degree angles is said to have an angle measure of n degrees.

NY-4.MD.6 Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure.

NY-4.MD.7 Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems.

4.MD.5.a An angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a "one-degree angle," and can be used to measure angles.

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